The World Health Organization (WHO) has called for a suspension on booster vaccines for Covid-19 until at least the end of September.
A Covid outbreak first discovered in the Chinese city of Nanjing has spread to five provinces and Beijing, with state media calling it the most extensive contagion after Wuhan.
India's government is promising to vaccinate the entire adult population by the end of 2021, but questions remain over whether it will have enough doses.
About one in three middle-aged people has multiple chronic health issues, a long-running British study suggests.
A longer gap between first and second doses of the Pfizer-BioNTech Covid vaccine makes the body's immune system produce more infection-fighting antibodies, UK researchers have found.
Daily rapid testing of school pupils who are close contacts of a Covid case did not lead to more virus spread than sending them home, a study has found.
Artificial intelligence has been used to predict the structures of almost every protein made by the human body.
Parents are being warned to look out for the signs of a common childhood respiratory illness, RSV, cases of which unusually appear to be rising rapidly in the summer.
Health and care workers are being "left behind" in efforts to vaccinate the world against Covid-19, nursing leaders say.
The government has confirmed nearly all remaining Covid-19 restrictions in England will be lifted on 19 July.
