Retiring NIH director issues warning to ‘tired’ Americans

National Institutes of Health (NIH) Director Francis Collins has called holiday travel for unvaccinated Americans “not a great idea” and left a dire warning about Omicron cases in his final days on the job.Whether vaccinated or not, those traveling for the holidays must do so “very carefully,” Collins told CBS’ ‘Face the Nation’ on Sunday, amid a rise in Covid-19 cases, as well as the potential threat of the Omicron variant. 
Collins admitted, howev