strains

Viruses can mutate to escape from antibodies, but the mRNA vaccines are not causing the emergence of more virulent strains, likely for at least two reasons.

Wolff said on Sunday that the Malaysia retirement had created strains in his relationship with Hamilton.

The developments highlight the administration’s aggressive posture on immigration, the tensions between federal and local governments, and internal strains within the DOJ as political priorities collide with career enforcement norms.

In some cases, the animals represent genetic strains that have been developed over many years and their loss will compromise prospects for future research for many years to come.

But even then, there is a six-month process of deciding on the new flu strains to be targeted, growing the vaccine at scale in chicken eggs and then distributing it.