According to a report on Nikkei on the 20th, the results of a study published in the Lancet by Sheba Medical Center in
Israel on the 18th showed that a survey of medical personnel vaccinated against
Pfizer found that 15-28 days after the first injection was completed.
After that, it has an 85% preventive effect on symptomatic viral infection, and 75% of the prevention effect, including asymptomatic.
The vaccine needs to be vaccinated twice every 21 days, and the preventive effect after two vaccinations can reach 95%.