Israel’s health ministry has noted that as the delta variant has become widespread, COVID-19 vaccines have shown a "marked decline in effectiveness" in preventing infections and symptomatic illness, down to 64%. But in a July 5 statement the ministry said the vaccines remain 93% effective at protecting against serious illness and hospitalization.
That view is consistent with the view of authorities at the World Health Organization, in the U.K. and in the U.S. In the U.S. the Centers for Disease Control says research looks reassuring, but it will continue to monitor the vaccines' efficacy.
All experts continue to urge eligible individuals to get vaccinated as the best protection against serious consequences or even death from contracting COVID-19.