MY EDMONDS NEWS Posted: February 2, 2021 Snohomish County vaccination site at Paine Field. (Photo courtesy Snohomish Health District) While the U.S. and other nations make steady but incremental progress in ironing out the many startup wrinkles bedeviling efforts to get vaccine to an increasingly anxious and frustrated public, the coronavirus is not sitting still. Capitalizing on its short generation time and dizzying ability to spread, the virus has already mutated into several new, more virulent and possibly vaccine-resistant strains, pitting health experts, vaccine manufacturers and government officials in an all-out race to slow the rate of viral mutation and contain the spread.