WASHINGTON, April 7 — People infected with Covid-19 are at increased risk for potentially life-threatening blood clots in their legs for up to three months after catching the virus, a study published Wednesday by the BMJ found.

REUTERS, April 14 — US federal health agencies on Tuesday recommended pausing the use of Johnson & Johnson's Covid-19 vaccine for at least a few days after six women under age 50 developed rare blood clots after receiving the shot, dealing a fresh setback to efforts to tackle the pandemic.

GENEVA, March 13 — Head of the World Health Organisation (WHO) said on Friday that the Geneva-based United Nations health agency "systematically reviews safety signals, and is carefully assessing the current reports on the AstraZeneca vaccine." The Covid-19 vaccine developed by AstraZeneca and...