US health chiefs are 'monitoring' a new Covid variant that is feared to be the 'most vaccine-resistant yet' after it sent cases spiraling in .The Centers for Disease Control and Prevention () said the strain — dubbed 'XBB' — was still 'very rare' in the US with just 52 cases detected in 15 states to date.But in a variant update today they confirmed they were keeping 'a close eye' on it after Singapore's cases doubled in a fortnight.
Load More
Load More