Các câu ví dụ cho từ variant

1. A separate study published in The Lancet Public Health medical journal found that vaccines were likely to be effective against the British variant since there was no apparent increase in reinfection rate when compared to non-U.

2. The F-7 is a Cold War-era fighter jet -- a Chinese made variant of the Soviet Union's MiG-21.

3. This variant, making its first appearance in Vietnam, contains two key mutations called E484Q and L452R, which have been found separately in other variants but not together in a single strain.

4. Vietnam is currently facing its most challenging Covid outbreak so far, triggered by the Delta variant, prompting localities to impose travel restrictions or tighten lockdown measures to control the pandemic.

5. The highly transmissible Delta variant, first identified in India, has become most common in many countries including Vietnam, where most of the new cases are associated with it.

6. There also continues to be concern about the latest mutations of this variant.

7. Sri Lanka said on Saturday it was barring travellers from the six southern African countries on Saturday over concerns about the new Omicron variant.

8. It is not yet known if the one positive test result is the Omicron variant, Hunt said.