Categories #canadahealth #canadahealthy #canadalistings #canadastory #canadianhealth Health Search Canada Online Listing U.S. FDA authorizes COVID-19 vaccine boosters for those with weak immune systems Post author By Search Canada Online Listing Blog Post date August 13, 2021 The U.S. Food and Drug Administration on Thursday authorized a booster dose of COVID-19 vaccines from Pfizer Inc and Moderna Inc for people with compromised immune systems. Share this:FacebookX Related ← Government of Canada negotiates additional agreement with Moderna for vaccine supply beyond 2021 → Government of Canada and Government of New Brunswick announce extension of support for quality early learning and child care across the province