In the trials, people were followed very closely for adverse events and the results between the vaccinated and unvaccinated were compared. Some of these are "sensors" that take reports of adverse events from health providers and the public. There have been twice as many doses of Covid vaccine administered around the world than there have been Covid cases, around 200 million. Since 1998 she has been involved in immunisation-related research in New Zealand, particularly on vaccine safety and effectiveness. She is co-leader of the Global Vaccine Data Network, a multinational consortium dedicated to collaboration in vaccine safety studies, and was previously the chair of the World Health Organisation Global Advisory Committee on Vaccine Safety (GACVS)

Source: Otago Daily Times February 17, 2021 23:26 UTC