Nation WHO recommends masks even for fully vaccinated; Pfizer, Moderna vaccines may offer long immunity: COVID-19 updates June 29, 2021June 29, 2021Elinor Aspegren and Steven Vargas, USA TODAYComments Off on WHO recommends masks even for fully vaccinated; Pfizer, Moderna vaccines may offer long immunity: COVID-19 updates The WHO is urging fully vaccinated people to keep wearing masks indoors. Study finds Pfizer, Moderna vaccines may offer immunity for years to come.