Vaccines give COVID-19 survivors big immune boost

Even people who have recovered from COVID-19 are urged to get vaccinated, especially as the extra-contagious delta variant surges — and a new study shows survivors who ignored that advice were more than twice as likely to get reinfected.

Friday’s report from the Centers for Disease Control and Prevention adds to growing laboratory evidence that people who had one bout of COVID-19 get a dramatic boost in virus-fighting immune cells — and a bonus of broader protection against new mutants — when they’re vaccinated.