Most Vulnerable To Be Focus Of Federal Boost In Covid Vaccine Supply Bay City News Service FacebookTwitterEmail By Bay City News Marin County health officials are partnering with the Ritter Center to ensure that the most vulnerable people not yet vaccinated benefit from a boost in vaccines provided by the federal government. The county has relied in weeks past on the state for its vaccine supply, but Marin officials said, "That changed this week as significantly more doses were made available directly to local community clinics by the federal government." The partnership with Ritter, a health center in San Rafael, will target several groups considered underserved: