. After a day of giving coronavirus vaccinations, Michael Weber and his team were headed back to Grants Pass, Ore., to administer their last doses on Tuesday when traffic suddenly came to a halt. Authorities had closed the snow-covered highway because of a car accident, and it would be hours before traffic could resume. But Weber and his team of 20 staff members and volunteers didn't have that much time to use the six Moderna doses they had left before the vaccines expired. That's when Weber had an idea: If he couldn't make it to the clinic on time, he could bring the clinic to six other drivers stranded on the highway.