“ Researchers found the effectiveness of the Pfizer vaccines against delta variant infections was 93% a month after the second dose and fell to 53% after four months. “
“… AstraZeneca vaccine’s performance against the Delta variant, which found around a 33% efficacy rate.“
“ Researchers found the effectiveness of the Pfizer vaccines against delta variant infections was 93% a month after the second dose and fell to 53% after four months. “
“… AstraZeneca vaccine’s performance against the Delta variant, which found around a 33% efficacy rate.“