After the Covid vaccine was administered in Portugal, it was reported that more than 80% of the negative side effects were related to the Pfizer COVID19 vaccine.
According to EudraVigilance, which reported adverse drug reactions, about 3,000 of the 3,650 complaints recorded in Portugal were related to the Pfizer vaccine. At the same time, AstraZeneca vaccine accounted for 15% of all complaints, accounting for about 500 cases.
In Europe, women seem to be more susceptible to side effects, accounting for nearly 75% of AstraZeneca-related complaints.
A real-world data analysis in Israel found that the coronavirus variant discovered in South Africa could escape the safety given by Pfizer/COVID-19 BioNTech's vaccine to some degree.
The research, which was published on Saturday, compared nearly 400 people who tested positive for COVID-19 14 days or more after receiving one or two doses of the vaccine to the same number of unvaccinated COVID-19 patients. It balanced people's age and gender, among other things.
According to a survey conducted by Tel Aviv University and Clalit, Israel's largest healthcare provider, the South African variant, B.1.351, was found to account for around 1% of all COVID-19 cases among all people surveyed.
The prevalence of the mutation was eight times higher in patients who had administered two doses of the vaccine compared to those who had not - 5.4 percent versus 0.7 percent.
According to the experts, this indicates that the vaccine is less successful against the South African version than it is against the original coronavirus and a variant first detected in Britain that now accounts for almost all COVID-19 cases in Israel.
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