SINGAPORE, Oct 15 (The Straits Times/ANN): People who have never caught Covid-19 or who were infected with the virus before the Delta wave in Singapore in 2021 face a higher chance of catching the new XBB strain of the Omicron variant.
Ministry of Health (MOH) figures show that the incidence rate for those who have never been infected with Covid-19, otherwise known as Covid-naive patients, is higher than for other groups.
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