French health authorities have tweaked their procedures for tracking the progression of coronavirus variants in a "more precise" and "more reactive" way.
WASHINGTON (BLOOMBERG) - Young adults previously infected with Covid-19 are still at risk of catching the disease again, according to a study of US military personnel that highlights the importance of vaccinating even those who have tested positive for the virus.
About 10 per cent of 189 people who had been infected once, most of them 18- to 20-year males, later became reinfected, according to a study of 2,346 US Marine Corps members published on Thursday (April 15) in The Lancet Respiratory Medicine journal. The study took place between May and November 2020.
Access to Covid-19 vaccines has become less secure in Europe as many countries have restricted the use of the AstraZeneca vaccine to their older populations due to its link with the rare form of blood clotting. Some, including Denmark have halted the use of the shot, while in the US, public health advisers have paused the use of Johnson & Johnson s vaccine on similar grounds.