Health director-general Tan Sri Dr Noor Hisham Abdullah defended his claim over the discovery of a Covid-19 D614G strain, which is said to be 10 times more infectious, after it was disputed by medical experts from Singapore.<br /><br />Noor Hisham said the claim was based on tests carried out at medical laboratories.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
