Scientists find chink in flu's armour

 作者:谭皙濑     |      日期:2019-03-09 03:13:01
THE flu virus is a slippery customer, expert at escaping attack by our immune system. But there is a chink in its defences that could lead to a universal flu vaccine. We can get flu repeatedly because the virus evolves: its surface proteins change, so the antibodies generated by one bout are not effective a second time. For the same reason, the vaccine for one year’s strain won’t work in later years. Now Wayne Marasco at Harvard University and his team may have found a way round this. The flu virus’s main surface protein, haemagglutinin, is lollipop-shaped,