https://www.mercurynews.com/2022/04/28/bart-renews-mask-mandate-staking-lone-policy-in-bay-area-transit/

BART riders will be required to mask up once again after the transit agency’s board of directors voted to reinstate a masking requirement through mid-July.

Following a flood of calls from concerned BART riders during a meeting on Thursday, board members made a near-unanimous vote approving a mask mandate, saying the operator needs to protect vulnerable riders who rely on the service.