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Flonaldo
Kiinalaisten rokotteen yhden annoksen luvut aika karut.
Chilean scientists are warning that China’s Sinovac vaccination, which is widely used in the developing world, offers “very weak” protection until after the second dose.
The study of 10.5 million people showed that the vaccine was just 16 per cent effective in guarding against Covid infection after one dose, rising to 67 per cent efficacy after the second dose.