Table 1.
Top 20 countries with prolific contributions on One Health-COVID-19.
| Rank | Country | Number of publications | % | Population (Thousands) | GDP (Millions-US$) | AI | AI rank |
|---|---|---|---|---|---|---|---|
| 1st | United States | 134 | 25.4 | 331 893.74 | 23 315 080.56 | 190.8 | 8th |
| 2nd | United Kingdom | 79 | 15.0 | 67 326.57 | 3 131 377.76 | 169.9 | 9th |
| 3rd | India | 56 | 10.6 | 1 407 563.84 | 3 176 295.07 | 2481.6 | 1st |
| 4th | Italy | 52 | 9.9 | 59 109.67 | 2 107 702.84 | 145.8 | 10th |
| 5th | France | 42 | 8.0 | 67 749.63 | 2 957 879.76 | 96.2 | 12th |
| 6th | Australia | 39 | 7.4 | 25 688.08 | 1 552 667.36 | 64.5 | 13th |
| 7th | China | 37 | 7.0 | 1 412 360.00 | 17 734 062.65 | 294.7 | 5th |
| 8th | Germany | 30 | 5.7 | 83 196.08 | 4 259 934.91 | 58.6 | 14th |
| 8th | Spain | 30 | 5.7 | 47 415.75 | 1 427 380.68 | 99.7 | 11th |
| 10th | Canada | 27 | 5.1 | 38 246.11 | 1 988 336.33 | 51.9 | 15th |
| 11th | Brazil | 26 | 4.9 | 214 326.22 | 1 608 981.46 | 346.3 | 4th |
| 12th | Netherlands | 24 | 4.6 | 17 533.04 | 1 012 846.76 | 41.5 | 16th |
| 12th | Switzerland | 24 | 4.6 | 8703.41 | 800 640.16 | 26.1 | 19th |
| 14th | Nigeria | 23 | 4.4 | 213 401.32 | 440 833.58 | 1113.4 | 3rd |
| 15th | Belgium | 17 | 3.2 | 11 592.95 | 594 104.18 | 33.2 | 18th |
| 16th | Thailand | 16 | 3.0 | 71 601.10 | 505 947.04 | 226.4 | 6th |
| 17th | South Africa | 15 | 2.8 | 59 392.25 | 419 015.02 | 212.6 | 7th |
| 18th | Ethiopia | 14 | 2.7 | 120 283.03 | 111 271.11 | 1513.4 | 2nd |
| 18th | Japan | 14 | 2.7 | 125 681.59 | 4 940 877.78 | 35.6 | 17th |
| 20th | Sweden | 13 | 2.5 | 10 415.81 | 635 663.80 | 21.3 | 20th |
Abbreviations: AI; adjustment index; GDP; gross domestic product.
The following formula was used to calculate an adjustment index (AI): AI = [Total number of publications for the country/GDP per capita of the country] × 100, where GDP per capita is the country’s GDP divided by its population.