As the global race to produce a Covid-19 vaccine continues, สล็อตออนไลน์ China appears to have made huge strides, with vaccines from two front-runners - Sinovac and Sinopharm - already making their way abroad. But what do we know about China's vaccines and how do they compare to those being developed elsewhere? How does the Sinovac vaccine work? The Beijing-based biopharmaceutical company Sinovac is behind the CoronaVac, an inactivated vaccine. It works by using killed viral particles to expose the body's immune system to the virus without risking a serious disease response. By comparison the Moderna and Pfizer vaccines being developed in the West are mRNA vaccines. This means part of the coronavirus' genetic code is injected into the body, triggering the body to begin making viral proteins, but not the whole virus, which is enough to train the immune system to attack. "CoronaVac is a more traditional method [of vaccine] that is successfully used in many well known vaccines like rabies," Associate Prof Luo Dahai of the Nanyang Technological University told the BBC. How effective is it? It's hard to say at this point in time. One Chinese study published in scientific journal The Lancet, only has information from the first and second phase trials of CoronaVac in China. Zhu Fengcai, one of the paper's authors, said those results - based on 144 participants in the phase one trial and 600 in the phase two trial - meant the vaccine was "suitable for emergency use". CoronaVac has been undergoing phase three trials in various countries. Interim data from late-stage trials in Turkey and Indonesia showed that the vaccine was 91.25% and 65.3% effective respectively.