US President Joe Biden on Tuesday said that people who are "not fully vaccinated" have "good reason to be concerned" about the spread of the Omicron...
At least 15 US states have confirmed the presence of Covid-19 variant, Omicron, said US Centers for Disease Control and Prevention...
The US on Wednesday reported its first case of the 'Omicron' variant of the Covid-19. The case has been detected in the US state of California, Top...
