Table 3.

Recent rare cases’ reports of thrombosis following administration of anti-SARS-CoV-2 vaccines. Data for ChAdOx1 nCov-19 vaccine are reported by 4 April 2021. Data for JNJ-78436735/Ad26.COV2.S are reported by 26 April 2021. CVST: cerebral venous sinus thrombosis, EEA: European Economic Area, UK: United Kingdom, US: United States.

Vaccine Type	Thrombosis Cases	Total Administrations	Associated Factors
ChAdOx1 nCov-19	169 CVST, 53 splanchnic vein thrombosis	34 million people had been vaccinated in the EEA and UK	<60 years of age, symptoms onset within 3 weeks after vaccination, female gender, thrombocytopenia.
JNJ-78436735/Ad26. COV2. S	6 CVST (1 death)	8.09 million in US	Thrombocytopenia, women between 18 and 48 ys. symptoms onset between 6 to 13 days after vaccination