I am writing to express my opinion on “ Hong Kong fourth wave: survey finds under 40 per cent willing to take coronavirus jab ” (January 12). Here’s why I am not keen on receiving the vaccination soon. First of all, we do not know what all the side effects of the vaccines are. It is true that children are vaccinated routinely in Hong Kong, even at birth. Vaccination is a normal way to protect ourselves. However, there are cases in which people are better off not being vaccinated, when the risk is higher than the utility. The technology used in the coronavirus vaccines is new, raising questions about its safety. Moreover, the vaccines do not guarantee anyone 100 per cent protection. The situation in Hong Kong is better than in the United States and Europe. Those of us who are healthy should continue taking steps to protect ourselves, such as wearing a mask. In offering vaccinations, we should prioritise high-risk groups and frontline workers, including those in the government and the police. Meanwhile, I would rather take the vaccine later, after we have more information about its efficacy and longer-term side effects. Wendy Chiu, Kwai Chung Carrie Lam should lead the way on Chinese vaccine Can we assume Chief Executive Carrie Lam Cheng Yuet-ngor will publicly be taking the first jab of the Sinovac vaccine to prove its safety to the people of Hong Kong? Mark Peaker, The Peak