Covid booster shots are pushing protection to unexpected heights
Covid booster shots are pushing protection to unexpected heights
Evidence suggests that vaccine booster programmes can take people’s covid-19 protection to unexpectedly high levels, but we don’t yet know how effective existing vaccines will be against the omicron variant
Evidence suggests that vaccine booster programmes can take people’s covid-19 protection to unexpectedly high levels, but we don’t yet know how effective existing vaccines will be against the omicron variant