Singapore’s home-grown biotech firm Esco Aster is working with a US company to develop a vaccine to be delivered as a nasal spray.<br /><br />This alternative method of delivering the vaccine is also currently being studied in China and the UK.<br /><br />WATCH MORE: https://thestartv.com/c/news<br />SUBSCRIBE: https://cutt.ly/TheStar<br />LIKE: https://fb.com/TheStarOnline
