Are booster shots safe and effective? Do we really need one? Who are the people who may need them? Can we mix vaccines?<br />We talk to Assoc Prof Dr Tan Toh Leong, an emergency physician at Hospital Canselor Tuanku Muhriz (UKM) to find out more.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
