Assistant Professor Tan Swee Ching's concern about heat stress grew when he realised healthcare workers endured a felt temperature of about 64 degree Celsius when donning personal protective equipment at room temperature.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline