By Eli Walsh. Bay City News
COVID-19 transmission levels remain high in San Mateo County, local health officials said Tuesday, and are likely to remain at a sustained level in the coming weeks.
Speaking to the county Board of Supervisors, San Mateo County health officials said the emergence of subvariants of the already highly contagious virus variant is keeping local and state transmission levels high.
The most recent subvariants of note, BA.4 and BA.5, are now the dominant strains of the virus in California and are estimated to be much more contagious than previous strains due to their apparent ability to evade antibody responses in those who have completed their initial vaccination series or have been previously affected, according to