Coronavirus has infected more than half a million people and killed 20,000, the head of the World Health Organization (WHO) said on Friday as he appealed again for protective gear for medical staff working to save lives.<br /><br />WHO director-general Tedros Adhanom Ghebreyesus also urged countries to refrain from using medicines that have not been demonstrated to be effective against COVID-19.<br /><br />Read more at https://bit.ly/2WO4fnn<br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline