People meet in central London as restrictions lift in England on 19 July Wiktor Szymanowicz/Anadolu Agency via Getty Images
BACK in March, an eventual end to the coronavirus pandemic appeared to be in sight. The number of covid-19 cases were plummeting in the UK and the US as vaccination levels rose. It seemed the same might gradually happen in country after country around the world.
But then India was hit by a devastating second wave, due largely to a new variant now known as delta. After delta spread to many other countries, case numbers soared once again, …
source: newscientist.com