Table 4. Characteristics of data from various reporting agencies.
Abbreviations: TTS, Thrombosis with thrombocytopenia syndrome; CVST, cerebral venous sinus thrombosis; NA, not available; MOHFW: Ministry of Health and Family Welfare; AEFI: adverse events following immunization
| Reporting agency | Country | Date of issue | Type of vaccine | Total doses administered | Events reported (n) | Sex (n) and age group | Fatality |
| Centers for Disease Control and Prevention (CDC) and US Food and Drug Administration (FDA) Vaccine Adverse Event Reporting System (VAERS) [9] | United States | 01 September 2021 | J&J/Janssen and Moderna | J&J/Janssen: over 14.3 million doses; Moderna: over 356 million doses | J&J/Janssen (TTS: 45); Moderna (TTS: 2) | N/A | N/A |
| Medicines and Healthcare products Regulatory Agency (MHRA) [10] Yellow card scheme | United Kingdom | 09 December 2020 to 01 September 2021 | AstraZeneca, Pfizer/BioNTech, and Moderna | AstraZeneca: 24.8 million first doses and 24.1 million second doses; Pfizer/BioNTech: 21.9 million first doses and 18.1 million second doses; Moderna: 1.4 million first doses and 0.9 million second doses | AstraZeneca: 416 major thromboembolic events with concurrent thrombocytopenia; 45 after second dose; CVST: 148 Pfizer/BioNTech: 17 major thromboembolic events with concurrent thrombocytopenia; Moderna: two major thromboembolic events with concurrent thrombocytopenia | AstraZeneca: Female (210); male (202); unknown (94); age: range, 18-93 years; Pfizer/BioNTech: female (6) Male: 11; age: range, 28-91 years; two cases with Moderna; both male and under the age of 50 | AstraZeneca: 72 deaths (17%), (6/72 after second dose); Pfizer/BioNTech: two deaths (12%); Moderna, no deaths |
| MOHFW, AEFI report from India [35]; National AEFI Committee | India | 16 January 2021 to 28 June 2021 | COVISHIELD (AstraZeneca) and COVAXIN | NA | 32 patients reported with events (32); only one case with COVAXIN; 21 cardiac events; two unexplained deaths; four Ischemic stroke cases; three haemorrhagic stroke; One case of venous haemorrhagic infarct; N/A (1) | Eight females; 24 males | Seven recovered; 25 dead |