Omicron BA.5 strain may shorten COVID immunity from 3 months to 28 days, research shows.
Omicron BA.5 strain may shorten COVID immunity from 3 months to 28 days, research shows.
abc7news.com /ba5-covid-immunity-omicron-ba4-reinfections-how-long-are-you-immune-from-after-having-it/12047575/