The World Health Organisation's chief scientist on Monday advised against people mixing and matching Covid-19 vaccines from different manufacturers, calling it a "dangerous trend" since there was little data available about the health impact. WATCH MORE: https://thestartv.com/c/news SUBSCRIBE: https://cutt.ly/TheStar LIKE: https://fb.com/TheStarOnline | The Star

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3.7K views | Let the AIM Master of Science in Data Science (MSDS)...