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Year Identified, Total Case Numbers, and Case Fatality Rates of SARS, H1N1, MERS, and COVID-19
| Virus | Year identified | Number of countries affected | Number of cases | Number of deaths | Case fatality rate |
|---|---|---|---|---|---|
| H1N1 | 2009 | >214 | 0.7 to 1.4 billion | 18 036 (confirmed) 284 000 (estimated) | 0.03% (estimated) |
| SARS (SARS-CoV) | 2002 | 26 | 8437 | 813 | 9.6% |
| MERS | 2012 | 27 | 2499 | 861 | 34.5% |
| COVID-19 | 2019 | >205 | >2 million | 33 509 | 4.8% |
