Are the Vaccines causing new variants?
AstraZeneca trials were in the UK, Brazil & South Africa
Summary of the safety profileThe overall safety of COVID-19 Vaccine AstraZeneca is based on an interim analysis of pooled data from four clinical trials conducted in the United Kingdom, Brazil, and South Africa.
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/978194/uk-HCP-covid-19-vaccine-astrazeneca-reg174_proposed_14_Apr_2021.pdf