The US, South Africa and European Union will temporarily stop the rollout of the Johnson & Johnson (J&J) Covid jab, after reports of rare blood clotting.
The G7 group of wealthy nations must lead a "Herculean mobilisation" to push for global mass vaccination against Covid, former PM Gordon Brown has said.
Brazil has recorded more than 4,000 Covid-related deaths in 24 hours for the first time, as a more contagious variant fuels a surge in cases.
People diagnosed with Covid-19 in the previous six months were more likely to develop depression, dementia, psychosis and stroke, researchers have found.
A trial of the Oxford-AstraZeneca Covid vaccine on children has stopped giving out jabs while the UK's medicines regulator investigates a possible link with rare blood clots in adults.
The head of the World Health Organization (WHO) has said further investigation is needed to conclusively rule out that Covid-19 emerged from a laboratory in China.
Pfizer says its vaccine is preventing 91% of coronavirus cases in the six months after people are immunised.
Pfizer says trials of its Covid vaccine in children aged 12 to 15 show 100% efficacy and a strong immune response.
Unusual blood clots in the brain have been detected in a handful of people after they were injected with the Oxford-AstraZeneca vaccine.
A single dose of the Pfizer or AstraZeneca vaccine was effective at stopping 62% of coronavirus infections in care homes, a study has found.
