At least 10 out of 26 Indonesian doctors who have died from Covid-19 this month had been fully vaccinated with Sinovac, prompting health experts to consider whether medics should receive alternative doses to boost immunity. Indonesia, which has relied on the Chinese-made vaccine for its health workers, is struggling with a new surge in coronavirus cases. On Monday the country announced 20,694 new infections. In Kudus, a town in central Java, more than 500 medical workers have tested positive for Covid-19 over the last two weeks, including one doctor who died. All were fully vaccinated. The data, released by the risk mitigation team of the Indonesian Medical Association (IMA), adds to questions about the level of protection that Sinovac provides against new, more infectious variants. The vaccine was approved for emergency use this month by the World Health Organization, which said efficacy results showed it prevented symptomatic disease in 51% of those vaccinated, and prevented severe Covid-19 and hospitalisation in 100% of the studied population. However, several countries that have vaccinated a large proportion of their population and used the Chinese-made Sinovac or Sinopharm vaccines as part of their inoculation campaigns have reported recent outbreaks. These include Mongolia, Seychelles, Bahrain and Chile.