The delta variant is surging through populations with low vaccination rates. But a single vaccine dose dramatically boosted their antibody levels — sparking cross-protection against the delta variant and two other mutants, the study found. There are now even more reasons for Canadians to roll up their sleeves, given that two doses of a COVID-19 vaccine appear to offer strong protection against COVID-19 mutants, whereas a first dose 'barely inhibited' the delta variant. Whether the fully vaccinated still need to wear masks in places where the delta variant is surging is a growing question. Pfizer to seek FDA authorization for 3rd-dose boosterAlso on Thursday, Pfizer said it plans to seek U.S. authorization for a third dose of its COVID-19 vaccine.

Source: CBC News July 08, 2021 18:43 UTC