Herd immunity: Israel to test 100,000 people to thwart second corona wave

Israel’s sampling of 100,000 citizens’ blood will provide insights into how widely the novel coronavirus has spread and whether Israelis have sufficient “herd immunity” against a second outbreak.

“This is the most important mission: Get ready for the next wave, especially a wave during wintertime,” when flu season will also begin, Ministry of Health Director General Moshe Bar Siman-Tov told The New York Times.

Although nobody knows if antibodies against Covid-19 will protect against reinfection—especially if the virus mutates—the Health Ministry said the data will help in preparing the healthc...