The World Health Organisation (WHO) said on Monday (May 11) that "extreme vigilance" was needed as countries begin to exit from lockdowns imposed to curb the spread of the Covid-19 coronavirus, amid global concerns about a second wave of infections.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline