Placebo study still to come, but inventor says medication 'could be a game changer' after around 9 out of 10 participants in Greek trial are released from hospital within 5 days

Majority of 39 'breakthrough' cases among 1,497 monitored were mild, but research author says persistence of symptoms among minority ‘raises concern’

PM hasn't said what prompted him to up the ante, but an influential expert panel is convinced that inoculating half of those still unvaccinated will stop the rise in cases

Latest research ‘definitely’ reinforces argument for giving elderly boosters, says lab chief at Leumit

Local research claims Pfizer shot now only 41% effective against symptomatic COVID, while British stats have it at 88%

As world talks of possible boosters, and with poorer countries struggling to get shots in arms, developer claims pill could be 'game-changer' by simplifying logistics

Report says protection against serious COVID-19 illness fell to 80%, or 50% for over-60s; government adviser, physician and health statistics expert all criticize research

If medicines pass clinical test for COVID, they’re also likely to prove effective for new variants, scientists say, as they target proteins that barely change between mutations

Research was conducted before Delta variant, but deputy head of Sheba Medical Center, which took part in effort, calls findings 'convincing illustration of vaccine effectiveness’

Cyrille Cohen talks Delta dynamics and booster shots, raises concerns and sounds warning alarm while also suggesting variant may further immunize some people for uncertain future