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Katherine L. O’Brien

Katherine L. O’Brien

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Microbiology 91 636 565 295 245 278 42884
Medicine 91 11554 10863 5928 5484 287 43043

Katherine L. O’Brien publications per year

The chart shows the history of publications by Katherine L. O’Brien between 1984 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Katherine L. O’Brien published across 42 years, from 1984 to 2025, averaging 7.5 papers a year. Output peaked at 40 publications in 2017. 21 of the 317 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1984 to 2025. Vertical axis: number of publications, 0 to 40. Peak 40 publications in 2017. 1984: 1 publication 1985: 0 publications 1986: 0 publications 1987: 0 publications 1988: 0 publications 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 1 publication 1994: 0 publications 1995: 1 publication 1996: 5 publications 1997: 1 publication 1998: 4 publications 1999: 1 publication 2000: 4 publications 2001: 8 publications 2002: 5 publications 2003: 8 publications 2004: 7 publications 2005: 4 publications 2006: 7 publications 2007: 15 publications 2008: 8 publications 2009: 10 publications 2010: 10 publications 2011: 3 publications 2012: 21 publications 2013: 19 publications 2014: 18 publications 2015: 11 publications 2016: 14 publications 2017: 40 publications 2018: 11 publications 2019: 16 publications 2020: 10 publications 2021: 23 publications 2022: 5 publications 2023: 5 publications 2024: 12 publications 2025: 9 publications
1984 2025

317 publications in total across all disciplines

View publications per year as a table
Katherine L. O’Brien: publications per year, 1984 to 2025
Year Publications
1984 1
1985 0
1986 0
1987 0
1988 0
1989 0
1990 0
1991 0
1992 0
1993 1
1994 0
1995 1
1996 5
1997 1
1998 4
1999 1
2000 4
2001 8
2002 5
2003 8
2004 7
2005 4
2006 7
2007 15
2008 8
2009 10
2010 10
2011 3
2012 21
2013 19
2014 18
2015 11
2016 14
2017 40
2018 11
2019 16
2020 10
2021 23
2022 5
2023 5
2024 12
2025 9
Total 317
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Katherine L. O’Brien publication distribution in Microbiology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Microbiology in 2026. The highlighted bar marks where Katherine L. O’Brien sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 64 bars. Horizontal axis: publications, 55–64 to 679+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 135–144 publications. The last bar groups every scientist with 679 publications or more. The highlighted bar, 275–284 publications, is where this scientist sits. 55–64 publications: 8 scientists 65–74 publications: 29 scientists 75–84 publications: 55 scientists 85–94 publications: 112 scientists 95–104 publications: 137 scientists 105–114 publications: 190 scientists 115–124 publications: 235 scientists 125–134 publications: 234 scientists 135–144 publications: 288 scientists 145–154 publications: 265 scientists 155–164 publications: 264 scientists 165–174 publications: 253 scientists 175–184 publications: 276 scientists 185–194 publications: 190 scientists 195–204 publications: 234 scientists 205–214 publications: 208 scientists 215–224 publications: 198 scientists 225–234 publications: 155 scientists 235–244 publications: 161 scientists 245–254 publications: 160 scientists 255–264 publications: 146 scientists 265–274 publications: 139 scientists 275–284 publications: 148 scientists 285–294 publications: 115 scientists 295–304 publications: 96 scientists 305–314 publications: 88 scientists 315–324 publications: 106 scientists 325–334 publications: 65 scientists 335–344 publications: 76 scientists 345–354 publications: 64 scientists 355–364 publications: 62 scientists 365–374 publications: 65 scientists 375–384 publications: 61 scientists 385–394 publications: 34 scientists 395–404 publications: 44 scientists 405–414 publications: 36 scientists 415–424 publications: 35 scientists 425–434 publications: 29 scientists 435–444 publications: 33 scientists 445–454 publications: 34 scientists 455–464 publications: 25 scientists 465–474 publications: 26 scientists 475–484 publications: 20 scientists 485–494 publications: 19 scientists 495–504 publications: 16 scientists 505–514 publications: 17 scientists 515–524 publications: 23 scientists 525–534 publications: 14 scientists 535–544 publications: 14 scientists 545–554 publications: 18 scientists 555–564 publications: 12 scientists 565–574 publications: 7 scientists 575–584 publications: 9 scientists 585–594 publications: 9 scientists 595–604 publications: 9 scientists 605–614 publications: 7 scientists 615–624 publications: 9 scientists 625–634 publications: 7 scientists 635–644 publications: 4 scientists 645–654 publications: 5 scientists 655–664 publications: 6 scientists 665–674 publications: 7 scientists 675–678 publications: 3 scientists 679+ publications: 99 scientists
55–64 publications 679+

This scientist: 278 publications — 73rd percentile

73% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 679 publications or more.

View publications distribution as a table
Number of Microbiology scientists by publication count, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
Publications Scientists This scientist
55–64 8
65–74 29
75–84 55
85–94 112
95–104 137
105–114 190
115–124 235
125–134 234
135–144 288
145–154 265
155–164 264
165–174 253
175–184 276
185–194 190
195–204 234
205–214 208
215–224 198
225–234 155
235–244 161
245–254 160
255–264 146
265–274 139
275–284 148 278
285–294 115
295–304 96
305–314 88
315–324 106
325–334 65
335–344 76
345–354 64
355–364 62
365–374 65
375–384 61
385–394 34
395–404 44
405–414 36
415–424 35
425–434 29
435–444 33
445–454 34
455–464 25
465–474 26
475–484 20
485–494 19
495–504 16
505–514 17
515–524 23
525–534 14
535–544 14
545–554 18
555–564 12
565–574 7
575–584 9
585–594 9
595–604 9
605–614 7
615–624 9
625–634 7
635–644 4
645–654 5
655–664 6
665–674 7
675–678 3
679+ 99
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Katherine L. O’Brien D-index placement in Microbiology in 2026

The chart shows the D-index (discipline H-index) distribution of Microbiology scientists ranked by Research.com in 2026. The highlighted bar marks where Katherine L. O’Brien sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 88 bars. Horizontal axis: D-Index, 40 to 127+. Vertical axis: number of scientists, 0 to 162. Most scientists, 162, have 58 D-Index. The last bar groups every scientist with 127 D-Index or more. The highlighted bar, 91 D-Index, is where this scientist sits. 40 D-Index: 30 scientists 41 D-Index: 86 scientists 42 D-Index: 90 scientists 43 D-Index: 117 scientists 44 D-Index: 122 scientists 45 D-Index: 123 scientists 46 D-Index: 108 scientists 47 D-Index: 110 scientists 48 D-Index: 106 scientists 49 D-Index: 109 scientists 50 D-Index: 129 scientists 51 D-Index: 111 scientists 52 D-Index: 116 scientists 53 D-Index: 127 scientists 54 D-Index: 134 scientists 55 D-Index: 134 scientists 56 D-Index: 112 scientists 57 D-Index: 136 scientists 58 D-Index: 162 scientists 59 D-Index: 151 scientists 60 D-Index: 139 scientists 61 D-Index: 123 scientists 62 D-Index: 126 scientists 63 D-Index: 144 scientists 64 D-Index: 109 scientists 65 D-Index: 103 scientists 66 D-Index: 124 scientists 67 D-Index: 112 scientists 68 D-Index: 103 scientists 69 D-Index: 131 scientists 70 D-Index: 94 scientists 71 D-Index: 93 scientists 72 D-Index: 96 scientists 73 D-Index: 92 scientists 74 D-Index: 80 scientists 75 D-Index: 66 scientists 76 D-Index: 87 scientists 77 D-Index: 60 scientists 78 D-Index: 73 scientists 79 D-Index: 59 scientists 80 D-Index: 57 scientists 81 D-Index: 55 scientists 82 D-Index: 47 scientists 83 D-Index: 77 scientists 84 D-Index: 50 scientists 85 D-Index: 45 scientists 86 D-Index: 42 scientists 87 D-Index: 41 scientists 88 D-Index: 32 scientists 89 D-Index: 38 scientists 90 D-Index: 35 scientists 91 D-Index: 34 scientists 92 D-Index: 27 scientists 93 D-Index: 26 scientists 94 D-Index: 33 scientists 95 D-Index: 22 scientists 96 D-Index: 37 scientists 97 D-Index: 22 scientists 98 D-Index: 21 scientists 99 D-Index: 22 scientists 100 D-Index: 30 scientists 101 D-Index: 16 scientists 102 D-Index: 20 scientists 103 D-Index: 17 scientists 104 D-Index: 19 scientists 105 D-Index: 16 scientists 106 D-Index: 19 scientists 107 D-Index: 18 scientists 108 D-Index: 14 scientists 109 D-Index: 10 scientists 110 D-Index: 9 scientists 111 D-Index: 7 scientists 112 D-Index: 11 scientists 113 D-Index: 6 scientists 114 D-Index: 15 scientists 115 D-Index: 10 scientists 116 D-Index: 12 scientists 117 D-Index: 7 scientists 118 D-Index: 10 scientists 119 D-Index: 10 scientists 120 D-Index: 11 scientists 121 D-Index: 2 scientists 122 D-Index: 7 scientists 123 D-Index: 12 scientists 124 D-Index: 5 scientists 125 D-Index: 9 scientists 126 D-Index: 6 scientists 127+ D-Index: 95 scientists
40 D-Index 127+

This scientist: 91 D-Index — 89th percentile

89% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 127 D-Index or more.

View D-Index distribution as a table
Number of Microbiology scientists by D-index, Research.com 2026 ranking edition. Based on 5,513 ranked scientists.
D-Index Scientists This scientist
40 30
41 86
42 90
43 117
44 122
45 123
46 108
47 110
48 106
49 109
50 129
51 111
52 116
53 127
54 134
55 134
56 112
57 136
58 162
59 151
60 139
61 123
62 126
63 144
64 109
65 103
66 124
67 112
68 103
69 131
70 94
71 93
72 96
73 92
74 80
75 66
76 87
77 60
78 73
79 59
80 57
81 55
82 47
83 77
84 50
85 45
86 42
87 41
88 32
89 38
90 35
91 34 91
92 27
93 26
94 33
95 22
96 37
97 22
98 21
99 22
100 30
101 16
102 20
103 17
104 19
105 16
106 19
107 18
108 14
109 10
110 9
111 7
112 11
113 6
114 15
115 10
116 12
117 7
118 10
119 10
120 11
121 2
122 7
123 12
124 5
125 9
126 6
127+ 95
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Overview

Katherine L. O'Brien is affiliated with Johns Hopkins University in the United States. Their research focuses extensively on medicine, with particular emphasis on epidemiology, infectious diseases, health, pulmonary and respiratory medicine, and public health, environmental and occupational health.

The scientist's main topics of study include pneumonia and respiratory infections, respiratory viral infections research, vaccine coverage and hesitancy, influenza virus research studies, Pneumocystis jirovecii pneumonia detection and treatment, SARS-CoV-2 and COVID-19 research, and bacterial infections and vaccines.

O'Brien has published significantly in several venues, with frequent publications appearing in:

  • The Pediatric Infectious Disease Journal
  • SSRN Electronic Journal
  • Vaccine
  • The Lancet Global Health
  • Journal of Pediatric and Adolescent Gynecology

Recent papers authored or co-authored by O'Brien include:

  • "Global burden of respiratory infections associated with seasonal influenza in children under 5 years in 2018: a systematic review and modelling study" (2020, The Lancet Global Health)
  • "Contribution of vaccination to improved survival and health: modelling 50 years of the Expanded Programme on Immunization" (2024, The Lancet)
  • "Global burden of acute lower respiratory infection associated with human metapneumovirus in children under 5 years in 2018: a systematic review and modelling study" (2020, The Lancet Global Health)
  • "The World of Immunization: Achievements, Challenges, and Strategic Vision for the Next Decade" (2021, The Journal of Infectious Diseases)
  • "Duration of Effectiveness of Vaccines Against SARS-CoV-2 Infection and COVID-19 Disease: Results of a Systematic Review and Meta-Regression" (2021, SSRN Electronic Journal)

Frequent co-authors of O'Brien include:

  • Maria Deloria Knoll
  • Laura L. Hammitt
  • Christine Prosperi
  • Daniel R. Feikin
  • David R. Murdoch

Best Publications

  • Global burden of acute lower respiratory infections due to respiratory syncytial virus in young children: a systematic review and meta-analysis

    Harish Nair;Harish Nair;D James Nokes;D James Nokes;Bradford D. Gessner;Mukesh K Dherani

  • Burden of disease caused by Streptococcus pneumoniae in children younger than 5 years: global estimates

    Katherine L O'Brien;Lara J Wolfson;James P Watt;Emily Henkle

  • Global, regional, and national disease burden estimates of acute lower respiratory infections due to respiratory syncytial virus in young children in 2015: a systematic review and modelling study

    Ting Shi;David A. McAllister;Katherine L. O'Brien;Eric A. F. Simoes

  • Global burden of childhood pneumonia and diarrhoea

    Christa L Fischer Walker;Igor Rudan;Li Liu;Harish Nair;Harish Nair

  • Safety and Efficacy of a Pentavalent Human–Bovine (WC3) Reassortant Rotavirus Vaccine

    Timo Vesikari;David O Matson;Penelope Dennehy;Pierre Van Damme

  • Single-dose administration and the influence of the timing of the booster dose on immunogenicity and efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine: a pooled analysis of four randomised trials.

    M Voysey;S A Costa Clemens;S A Madhi;L Y Weckx

  • Burden of Streptococcus pneumoniae and Haemophilus influenzae type b disease in children in the era of conjugate vaccines: global, regional, and national estimates for 2000–15

    Brian Wahl;Katherine L O'Brien;Adena Greenbaum;Anwesha Majumder

  • Causes of severe pneumonia requiring hospital admission in children without HIV infection from Africa and Asia: the PERCH multi-country case-control study

    Katherine L. O'Brien;Henry C. Baggett;W. Abdullah Brooks;Daniel R. Feikin

  • Standardized interpretation of paediatric chest radiographs for the diagnosis of pneumonia in epidemiological studies

    Thomas Cherian;E. Kim Mulholland;John B. Carlin;Harald Ostensen

  • The fundamental link between pneumococcal carriage and disease

    Birgit Simell;Kari Auranen;Helena Käyhty;David Goldblatt

  • Epidemiology and etiology of childhood pneumonia in 2010: estimates of incidence, severe morbidity, mortality, underlying risk factors and causative pathogens for 192 countries.

    Igor Rudan;Katherine L. O’Brien;Harish Nair;Li Liu

  • Systematic evaluation of serotypes causing invasive pneumococcal disease among children under five: the pneumococcal global serotype project.

    Hope L. Johnson;Maria Deloria-Knoll;Orin S. Levine;Sonia K. Stoszek

  • Burden of disease caused by Haemophilus influenzae type b in children younger than 5 years: global estimates.

    James P. Watt;Lara J. Wolfson;Katherine L O'Brien;Emily Henkle

  • Standard method for detecting upper respiratory carriage of Streptococcus pneumoniae: updated recommendations from the World Health Organization Pneumococcal Carriage Working Group.

    Catherine Satzke;Catherine Satzke;Paul Turner;Paul Turner;Anni Virolainen-Julkunen;Peter V. Adrian

  • Efficacy and safety of seven-valent conjugate pneumococcal vaccine in American Indian children: group randomised trial

    Katherine L O'Brien;Lawrence H Moulton;Raymond Reid;Robert Weatherholtz

  • Serotype-specific changes in invasive pneumococcal disease after pneumococcal conjugate vaccine introduction: a pooled analysis of multiple surveillance sites.

    Daniel R. Feikin;Eunice W. Kagucia;Jennifer D. Loo;Ruth Link-Gelles

  • Estimating the Burden of Pneumococcal Pneumonia among Adults: A Systematic Review and Meta-Analysis of Diagnostic Techniques

    Unknown

  • Report from a WHO working group: standard method for detecting upper respiratory carriage of Streptococcus pneumoniae

    Katherine L O'Brien;Hanna Nohynek;Hanna Nohynek

  • Global burden of respiratory infections associated with seasonal influenza in children under 5 years in 2018: a systematic review and modelling study.

    Xin Wang;You Li;Katherine L. O'Brien;Shabir A. Madhi

  • Epidemiology of Invasive Group A Streptococcus Disease in the United States, 1995–1999

    Katherine L O'Brien;Bernard Beall;Nancy L Barrett;Paul R Cieslak

  • Effectiveness of seven-valent pneumococcal conjugate vaccine against invasive pneumococcal disease: a matched case-control study.(Clinical report)

    Katherine L. O'brien;Orin S. Levine;Cynthia G. Whitney;Tamar Pilishvili

  • The fundamental link between pneumococcal carriage and disease

    Birgit Simell;Kari Auranen;Helena Kayhty;David Goldblatt

Frequent Co-Authors

Mathuram Santosham
Mathuram Santosham Johns Hopkins University
J. Anthony G. Scott
J. Anthony G. Scott University of London
Shabir A. Madhi
Shabir A. Madhi University of the Witwatersrand
David R. Murdoch
David R. Murdoch University of Otago
Maria Deloria Knoll
Maria Deloria Knoll Johns Hopkins University
Daniel R. Feikin
Daniel R. Feikin Centers for Disease Control and Prevention
David Goldblatt
David Goldblatt University College London
Cynthia G. Whitney
Cynthia G. Whitney Emory University
Ruth A. Karron
Ruth A. Karron Johns Hopkins University
W. Abdullah Brooks
W. Abdullah Brooks Johns Hopkins University

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