Source: China – South China Morning PostA third dose of the Covid-19 vaccine by Sinovac Biotech can boost a flagging immune response to the highly transmissible Delta variant, a team of Chinese researchers has found.Study participants who received a three-dose regimen of the Sinovac shot showed a more than 2½ times higher neutralising ability against Delta four weeks after the last shot, compared with those who received two doses or had recovered from a naturally acquired Covid-19 infection, according to the small-scale study that…Read More