Source: South China Morning PostJohnson & Johnson had reached out to rival Covid-19 vaccine makers to join in an effort to study the risks of blood clots, The Wall Street Journal reported on Friday, citing people familiar with the matter.AstraZeneca, which had been buffeted by similar blood clotting concerns for weeks, agreed, while Pfizer and Moderna executive declined, saying their vaccines appeared safe, the report said.The US federal health agencies had on Tuesday recommended pausing use of Johnson & Johnson’s vaccine for…Read More