Israel says its Covid vaccine pass, which grants access to venues like restaurants and bars, now expires six months after the second dose of vaccine. Getting a booster shot five months after the second dose extends the pass by another six months.

As the Delta variant of Covid-19 sends other countries back into lockdown, officials in Saudi Arabia are counting on a strategy that makes vaccination all-but mandatory. This had made it a test case in what happens when people who are reluctant to get inoculated are pushed into a corner.

A new study suggests that people of African descent should consider taking vitamin D supplements and consume more vitamin D rich foods.

More evidence of a protective link between nutrients and the onset of dementia has been published by scientists at Kings College London.