Protection against infection offered by fourth Covid-19 vaccine dose wanes quickly... [View all]

"Protection against infection offered by fourth Covid-19 vaccine dose wanes quickly, Israeli study finds"

https://www.cnn.com/2022/04/05/health/israel-fourth-dose-study/index.html#amp_tf=From%20%251%24s&aoh=16492801940818&csi=1&referrer=https%3A%2F%2Fwww.google.com&ampshare=https%3A%2F%2Fwww.cnn.com%2F2022%2F04%2F05%2Fhealth%2Fisrael-fourth-dose-study%2Findex.html

"A fourth dose of the Pfizer/BioNTech Covid-19 vaccine seems to offer short-lived protection against infection overall, but protection against severe illness did not wane for at least several weeks, according to a new study."

"Overall, these analyses provide evidence for the effectiveness of a fourth vaccine dose against severe illness caused by Omicron variant as compared with a third dose administered more than four months later," the study says."