Daily briefing: Evidence from Israel for COVID-vaccine boosters

Nature, Published online: 17 September 2021; doi:10.1038/d41586-021-02566-8

A third COVID shot for people over 60 seems to drop the risk of severe disease by 19.5%. Plus, a new type of dark energy could solve a mystery about the Universe, and coronaviruses might jump from bats to humans 400,000 times per year.