15 Tevet 5781
WHO urges vaccinated travelers to take coronavirus precautionsWorld Health Organization chief scientist Soumya Swaminathan told a virtual briefing Monday people who've been vaccinated for COVID-19 "need to take the same precautions" as those who haven't "till there's a certain level of herd immunity."Driving the news: Swaminathan was asked whether international travel without quarantine would be possible after mass coronavirus vaccinations. "I don't believe we have the evidence on any of the vaccines to be confident that it's going to prevent people from actually getting the infection and therefore being able to pass it on," she said.
...It's also unknown whether people can have rare or delayed side effects, which could be detected in long-term trials with millions of participants.