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COVID-19 updates: Haryana extends curbs till 12 July; Sikkim to allow fully vaccinated visitors from tomorrow
Coronavirus variant in Brazil infected many who had already recovered from COVID-19
People who develop Coronavirus antibodies much less likely to test positive again for up to six months or more: Study
US sees first suspected case of coronavirus reinfection in Nevada's Reno; 25-year-old 'much sicker' than last time, officials say
