COVID-19 Clinical Research Studies

COVID-19 Clinical Research Studies is a research topic within Infectious Diseases. Science Explorer counts 51k research works in it since 1950. 9.6% of them reached the world's top 10% most cited for their field and year.

This cluster of papers focuses on the clinical characteristics, epidemiology, immune response, and treatment of Coronavirus Disease 2019 (COVID-19), caused by the SARS-CoV-2 virus. It covers topics such as thrombosis, ACE2 receptor, cytokine storm, and the pandemic's impact on various populations.

Clinical Characteristics
SARS-CoV-2
Epidemiology
Thrombosis
Immune Response
ACE2 Receptor
Cytokine Storm
Antiviral Treatment
Pathophysiology
Pandemic

Research works: 51k
In the world top 10%: 4.9k
Top-10% rate: 9.6%
Growth, 2018-21 → 2022-25: -3%
Largest producer: United States

COVID-19 Clinical Research Studies

This ranks research output and citation impact. It says nothing about the quality of diagnosis, treatment or care.

Which countries lead COVID-19 Clinical Research Studies research?

By volume, the United States and China publish the most (4.2k and 2.1k works in 2022-now).

By volume, 2022-now

1 United States 4.2k works
2 China 2.1k works
3 India 1.8k works
4 Italy 1.1k works
5 Iran 914 works
6 United Kingdom 895 works
7 Brazil 892 works
8 Türkiye 876 works
9 Spain 796 works
10 Japan 692 works

How concentrated that is

The same countries as shares of everything the list above accounts for. A node where two countries do two thirds of the work and one spread evenly across twelve read alike as a ranking and not at all alike here.

United States4,175 · 29.5%China2,051 · 14.5%India1,824 · 12.9%Italy1,058 · 7.5%6 others listed5,065 · 35.7%

Shares of the rows listed above, not of the whole node.

Which institutions lead COVID-19 Clinical Research Studies research?

By volume in 2022-now, Harvard University publishes the most COVID-19 Clinical Research Studies research, followed by All India Institute of Medical Sciences and University of North Carolina at Chapel Hill.

By volume, 2022-now

1 Harvard UniversityUnited States 158 works
2 All India Institute of Medical SciencesIndia 140 works
3 University of North Carolina at Chapel HillUnited States 139 works
4 Tehran University of Medical SciencesIran 106 works
5 Sağlık Bilimleri ÜniversitesiTürkiye 96 works
6 Johns Hopkins UniversityUnited States 88 works
7 InsermFrance 86 works
8 National Institutes of HealthUnited States 82 works
9 Russian Academy of SciencesRussia 79 works
10 Universidade de São PauloBrazil 77 works

Who are the leading researchers in COVID-19 Clinical Research Studies?

The most-cited researchers publishing on COVID-19 Clinical Research Studies include David Moher, Christopher J L Murray and Freddie Bray.

1 David Moher Canada 898k citations
2 Christopher J L Murray United States 583k citations
3 Freddie Bray France 550k citations
4 Zhong Lin Wang United States 491k citations
5 Rob Knight United States 468k citations
6 Simon Iain Hay United States 452k citations
7 Theo Vos United States 439k citations
8 George Davey Smith United Kingdom 435k citations
9 Ali H. Mokdad United States 429k citations
10 Mark J. Daly United States 403k citations

Ranked by citations received across their whole record, among researchers with at least three works on this topic.

What are the most cited papers in COVID-19 Clinical Research Studies?

The most cited paper in COVID-19 Clinical Research Studies is "Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China" (Chaolin Huang et al., 2020), with 52,028 citations. Next come "Clinical Characteristics of Coronavirus Disease 2019 in China" (31,256) and "A Novel Coronavirus from Patients with Pneumonia in China, 2019" (30,499).

Most cited papers
#	Paper	Released	Citations
1	Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China Chaolin Huang et al. · The Lancet Open access	24 Jan 2020	52,028
2	Clinical Characteristics of Coronavirus Disease 2019 in China Wei‐jie Guan et al. · New England Journal of Medicine Open access	28 Feb 2020	31,256
3	A Novel Coronavirus from Patients with Pneumonia in China, 2019 Na Zhu, Dingyu Zhang, Wenling Wang et al. · New England Journal of Medicine Open access	24 Jan 2020	30,499
4	Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan, China: a retrospective cohort study Fei Zhou, Ting Yu, Ronghui Du et al. · The Lancet Open access	Mar 2020	29,236
5	A pneumonia outbreak associated with a new coronavirus of probable bat origin Peng Zhou et al. · Nature Open access	3 Feb 2020	23,429

All 98 most cited papers, with filters and sorting

Where is COVID-19 Clinical Research Studies research done?

The largest centres of COVID-19 Clinical Research Studies research in 2022-now are Tehran (Iran), Beijing (China), London (United Kingdom) and Moscow (Russia).

Largest cities, 2022-now

1 TehranIran 347 works
2 BeijingChina 345 works
3 LondonUnited Kingdom 319 works
4 MoscowRussia 281 works
5 IstanbulTürkiye 271 works
6 MadridSpain 245 works
7 New YorkUnited States 243 works
8 TokyoJapan 217 works
9 São PauloBrazil 215 works
10 RomeItaly 210 works

See COVID-19 Clinical Research Studies on the map

Where is the best place to study COVID-19 Clinical Research Studies?

Among universities, judged by research, University of Hong Kong, Harvard University and Karolinska Institutet score highest, combining citation excellence, specialisation, size, growth and international reach. Research strength is one signal when choosing where to study; it does not measure teaching.

above the meannear itbelow it

One dot per university in the first ten of the table below, at the default weights. The upper left is the interesting corner: small places doing unusually strong work.

Citation excellenceshare of its work in the world top 10%, 2022-now and all time averaged

40%

Specialisationhow much of its work is in this field, counted up to 10× the world share

10%

Sizeits output in this field, on a log scale

30%

Growthoutput growth, counted from -20% to +20%

10%

Internationalshare of its work with a co-author abroad

10%

Each slider sets a weight; the share it gets of the score is beside it.

#	University	Score	Top 10%	Specialisation	Works	Growth
1	University of Hong KongChina	78.6	22.8%	2.6×	51	+16.5%
2	Harvard UniversityUnited States	74.7	21.6%	2.4×	158	-28.0%
3	Karolinska InstitutetSweden	68.3	18.9%	4.3×	51	+8.7%
4	London School of Hygiene & Tropical MedicineUnited Kingdom	67.1	23.0%	6.0×	20	-0.1%
5	University of OxfordUnited Kingdom	63.4	23.1%	1.8×	52	-24.4%
6	University of CopenhagenDenmark	63.2	20.0%	1.6×	32	+26.8%
7	Johns Hopkins UniversityUnited States	62.8	17.4%	2.8×	88	-12.9%
8	Imperial College LondonUnited Kingdom	62.7	23.1%	2.0×	42	-31.9%
9	Erasmus University RotterdamNetherlands	62.7	20.5%	2.3×	25	+11.2%
10	Chinese University of Hong KongChina	62.4	21.5%	1.7×	26	+9.8%
11	University College LondonUnited Kingdom	61.5	21.0%	1.6×	53	-21.0%
12	Utrecht UniversityNetherlands	61.5	21.7%	1.3×	19	+29.4%
13	University of TorontoCanada	61.2	17.5%	1.6×	66	-3.2%
14	Cornell UniversityUnited States	59.7	18.9%	2.4×	66	-34.8%
15	Washington University in St. LouisUnited States	59.6	23.5%	1.9×	28	-6.2%
16	Chinese Academy of Medical Sciences & Peking Union Medical CollegeChina	59.4	15.2%	2.6×	56	+5.7%
17	University of California San DiegoUnited States	59.4	22.3%	1.6×	32	-2.9%
18	Albert Einstein College of MedicineUnited States	59.1	23.1%	5.7×	40	-42.2%
19	University of WashingtonUnited States	59.1	20.4%	1.5×	36	-4.4%
20	National and Kapodistrian University of AthensGreece	58.1	10.4%	5.2×	55	+31.8%
21	University of North Carolina at Chapel HillUnited States	57.5	5.1%	3.7×	139	+206.8%
22	Heinrich Heine University DüsseldorfGermany	56.7	22.8%	2.1×	16	+8.2%
23	The Ohio State UniversityUnited States	56.1	23.4%	1.0×	26	+3.2%
24	The University of MelbourneAustralia	56.0	20.2%	1.2×	28	+2.7%
25	University of AmsterdamNetherlands	55.7	20.2%	1.2×	15	+37.1%
26	Stanford UniversityUnited States	55.5	19.1%	1.4×	41	-15.0%
27	McGill UniversityCanada	55.3	15.7%	1.5×	32	+26.5%
28	Aarhus UniversityDenmark	55.1	23.6%	0.8×	14	+6.4%
29	University of California, San FranciscoUnited States	55.0	21.7%	2.3×	34	-15.6%
30	Peking UniversityChina	54.6	17.2%	1.1×	48	-4.5%
31	University of British ColumbiaCanada	54.4	17.2%	1.2×	31	+5.3%
32	University of LeicesterUnited Kingdom	54.2	24.1%	2.6×	15	-16.2%
33	University of OttawaCanada	54.0	16.1%	1.8×	24	+82.5%
34	Victor Babeș University of Medicine and Pharmacy TimișoaraRomania	53.9	14.4%	13.6×	25	+278.1%
35	Tel Aviv UniversityIsrael	53.6	10.5%	3.4×	56	+1.5%
36	University of Colorado Anschutz Medical CampusUnited States	53.1	20.9%	2.4×	13	+40.3%
37	Mahidol UniversityThailand	53.0	11.0%	3.9×	39	+122.5%
38	Yale UniversityUnited States	52.9	18.5%	1.7×	38	-42.0%
39	National University of SingaporeSingapore	52.5	19.3%	1.2×	30	-20.2%
40	Heidelberg UniversityGermany	52.4	14.5%	1.7×	28	+12.5%
41	Universidade de São PauloBrazil	51.7	10.4%	1.8×	77	+2.2%
42	KU LeuvenBelgium	51.6	24.0%	0.9×	19	-27.1%
43	Medical University of BiałystokPoland	51.1	14.6%	10.3×	18	+210.8%
44	Tehran University of Medical SciencesIran	50.8	7.7%	8.5×	106	-16.9%
45	Sağlık Bilimleri ÜniversitesiTürkiye	49.2	1.4%	8.3×	96	+23.0%
46	University of FreiburgGermany	48.2	27.1%	1.4×	14	-17.1%
47	All India Institute of Medical SciencesIndia	43.9	2.3%	6.1×	140	-15.5%
48	Ain Shams UniversityEgypt	43.4	1.7%	4.7×	69	+138.0%
49	Maastricht UniversityNetherlands	43.3	12.9%	2.1×	17	+8.9%
50	Ardabil University of Medical SciencesIran	37.2	10.0%	13.4×	12	+378.6%
51	Babol University of Medical SciencesIran	35.9	6.5%	13.7×	17	+53.2%
52	Ahvaz Jundishapur University of Medical SciencesIran	35.7	3.2%	10.3×	24	+52.3%
53	King Saud UniversitySaudi Arabia	35.1	7.9%	1.4×	29	-30.2%
54	Qatar UniversityQatar	35.0	13.7%	2.0×	12	-12.5%
55	University of Health Sciences AntiguaAntigua and Barbuda	32.0	0.9%	5.6×	12	+33.9%
56	Jazan UniversitySaudi Arabia	31.7	5.9%	2.8×	12	+25.0%
57	Maharashtra Institute of Medical Science and ResearchIndia	30.5	4.1%	50.2×	15	+788.1%
58	Shahid Sadoughi University of Medical Sciences and Health ServicesIran	29.8	2.0%	10.2×	18	+141.5%
59	Bangladesh Medical UniversityBangladesh	28.0	0.6%	11.6×	19	+99.0%
60	Hormozgan University of Medical SciencesIran	26.4	1.4%	19.3×	15	+71.8%
61	Nicolae Testemițanu State University of Medicine and PharmacyMoldova	23.2	0.1%	12.3×	13	+133.9%

Universities only. The score blends citation excellence (40%), size (30%), specialisation (10%), growth (10%), international reach (10%), 2022-now; growth compares 2018-21 with 2022-25 and counts up to +20%, since a jump from a small base is mostly noise.

Every institution in COVID-19 Clinical Research Studies, country by country

Is COVID-19 Clinical Research Studies research growing?

Output in 2022-2025 was 3% lower than in 2018-2021, peaking in 2021.

grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is COVID-19 Clinical Research Studies as a percentage of every work published that year, 0.076% in 2024.

Fractional works of COVID-19 Clinical Research Studies over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year.

Of each year's works in it, the share that reached the world's 10% most cited for their field and year. A field is the world for its own topics, so there is no other line to hold it against.

Which topics inside it are moving

Growth and decline on one axis around a shared zero. Two lists side by side hide the thing that matters: whether the growth dwarfs the decline, or the other way round.

Questions people ask

How much research is there on long COVID and COVID-19, and is it growing?

Output in 2022-2025 was 3% lower than in 2018-2021, peaking in 2021.

Is COVID-19 Clinical Research Studies research growing?

All 1,273 questions in the Question Catalogue

Discussion

Ask a question or share a note about COVID-19 Clinical Research Studies. Keep it to the research: no personal attacks, advertising or links. Any reader can report a post, which collapses it for everyone until it is opened.

Which countries lead COVID-19 Clinical Research Studies research?

By volume, 2022-now

How concentrated that is

Which institutions lead COVID-19 Clinical Research Studies research?

By volume, 2022-now

Who are the leading researchers in COVID-19 Clinical Research Studies?

What are the most cited papers in COVID-19 Clinical Research Studies?

Where is COVID-19 Clinical Research Studies research done?

Largest cities, 2022-now

Where is the best place to study COVID-19 Clinical Research Studies?

Is COVID-19 Clinical Research Studies research growing?

Its share of all research

How much of it reaches the world top 10%

Which topics inside it are moving

Related research

Questions people ask

How much research is there on long COVID and COVID-19, and is it growing?

Discussion