The effectiveness of Pfizer’s COVID-19 vaccine in preventing symptomatic infection drops by more than 10 percent after six months, the company said on July 28. The two-dose vaccine, developed in conjunction with Germany’s BioNTech, was found to be 96 percent effective for the first two months following the second dose, according to a study from the companies’ scientists. However, the efficacy drops in the following months, declining to 83.7 percent after four to six months. CEO Albert Bourla said on CNBC that a drop in efficacy after such a short time is “not uncommon.” Effectiveness in preventing severe disease remained at about 97 percent for up to six months, the end time of the published data, which comes from an ongoing study of 42,000 volunteers across six countries who each received two doses three weeks apart. The new results, which are through March 13, follow other indications that the protection …
Read More
RSS Feed | The Epoch Times
