Coronavirus live: more than half of all European adults fully vaccinated; more Olympic athletes test positive in Tokyo

More than 200 million Europeans fully vaccinated but programme still behind summer target; more Olympic athletes confirmed to have Covid

‘It’s too late’: US doctor says dying patients asking for Covid vaccine Italy set to impose ‘green pass’ restrictions on unvaccinated peopleStark silence in Tokyo speaks volumes about Olympic fearsChina refuses further inquiry into Covid-19 origins in Wuhan labTax raids target Indian paper that criticised government over Covid

10.09pm BST

Workers from 16 key services including health, transport and energy will not have to isolate after being pinged by the NHS Covid app, as it was revealed that more than 600,000 people in England and Wales were sent self-isolation alerts last week.

The raft of changes, after days of frantic talks with industry leaders, came amid open Conservative revolt over the so-called “pingdemic” with the former health secretary Jeremy Hunt warning the government that it was facing a crisis of public trust in the system.

Related: Limited number of critical workers to be allowed to avoid self-isolation

9.27pm BST

Advisers to the US Centers for Disease Control and Prevention on Thursday will consider evidence suggesting that a booster dose of Covid vaccines could increase protection among people with compromised immune systems, Reuters reports.

Data presented ahead of the meeting noted that such people have a reduced antibody response following the recommended primary vaccination series compared with healthy individuals.

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