> "The C.D.C. recommends vaccines even for people who have been infected with the virus. Some evidence suggests a prior infection offers less protection than a

> "The C.D.C. recommends vaccines even for people who have been infected with the virus. Some evidence suggests a prior infection offers less protection than a vaccine, particularly against variants like Delta." Does it really? I've not seen any such evidence, and have a hard time believing it. It sure doesn't help that there's no link or mention of what this evidence might be.