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South China Morning Post A young Hongkonger who returned from the United States caused a stir earlier this month when he not only tested positive for Covid-19, but was also found to be highly infectious. What made the case unusual was that the 27-year-old man was fully vaccinated in Hong Kong before his two-week trip to the US. But medical experts insist there is no cause for alarm, with Professor David Hui Shu-cheong of Chinese University saying it was thanks to Hong Kong s tough quarantine and contact-tracing regime that there had been no outbreak so far from the case. Experts said the man s increased infectiousness was due to the fast-spreading, highly transmissible Delta variant of the coronavirus, and emphasised that vaccines helped mainly to protect against severe illness and death.

United statesHong kongUnited kingdomYuen kwok yungDavid hui shu cheongLeung chi chiuChinese universityChinese university huiCentre for health protectionProfessor david hui shu cheongDisease controlProfessor yuen kwok yungHealth protectionஒன்றுபட்டது மாநிலங்களில்ஹாங் காங்ஒன்றுபட்டது கிஂக்டம்