Colorado sees summer COVID bump as new FLiRT variants keep virus from settling into seasonal pattern

HOLLY SPRINGS, N.C. ‒ A quiet effort to prevent the next global pandemic began rolling off an assembly line this summer behind the gates of an office complex in suburban Raleigh. In this sprawling factory, sheltered by thick pine groves, workers at CSL Seqirus are bottling millions of doses of a new vaccine targeting the H5N1 bird flu virus.