Microplastics in bottled water: more particles, unclear harm
A review of 21 studies found more plastic in bottled water than tap, yet the World Health Organization says the health evidence still has gaps.
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One yellow fever jab now covers a traveller for life
Many countries in Africa and South America want proof of yellow fever vaccination at the border. Since 2016 the certificate has stayed valid for life.
The UK is cutting aid to its lowest share of income since 1999
Britain's aid spending is set to fall to 0.3% of national income by 2027 to pay for defence. Aid to Africa falls by more than half, and polio funding ends.
The first vaccine began with a cowpox sore
In 1796, Edward Jenner scratched cowpox matter into an eight-year-old boy's arm, then tested him against smallpox itself.
NHS England ranks 999 calls, and category 2 is the crowded one
England's ambulance services sort 999 calls into categories. Category 1 is the most urgent, and category 2 covers strokes and heart attacks.
Is Taco Bell safe to eat after the US Cyclospora outbreak?
Taco Bell pulled the lettuce tied to a US Cyclospora outbreak in July. Food safety scientist Tamika D. Sims says there is no reason to avoid the chain now.
Doctors rarely find one cause for high blood pressure
Most high blood pressure has no single cause, say the British Heart Foundation and Cleveland Clinic. The NHS counts 140/90 as high, the United States 130/80.