Shipments of more than 15,000 doses of the COVID-19 vaccine promised to the San Joaquin Valley have been delayed this week, thanks to severe weather that has snarled shipping and distribution networks in the central and eastern parts of the country. “All of our doses for last week were held up because of weather,” or about 6,000 doses, said Kern County Public Health Director Brynn Carrigan during a media call on Friday. Mariposa County is also waiting for a week’s supply, about 500 doses, while