Booster shots likely needed, expert says

Individuals who have been fully vaccinated against Covid-19, as well as those who have fully recovered against the disease, are likely to need booster shots to maintain sufficient protection against reinfection, a virus expert is warning.

Yong Poovorawan, head of the Centre of Excellence in Clinical Virology of Chulalongkorn University, said in a Facebook post on Monday that a study into recovered patients suggested that immunity against Covid-19 begins to decrease around three to six months after being infected.

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Wassayos Ngamkham