(Julian Daniel, Sunday Willett/ The Conversation) — Vaccines are the holy grails of disease prevention. These medical marvels confer significant protection against diseases — whether a childhood infection, annual influenza or a novel coronavirus — that can easily cause undue suffering.

The polio vaccine prevents  …

(Maayan Lubell/ CTV News) — Less than a month into a COVID-19 vaccine booster drive, Israel is seeing signs of an impact on the country’s high infection and severe illness rates fueled by the fast-spreading Delta variant, officials and scientists say.

Delta hit Israel in June, just as the country began to reap the   …