kaiser permanente will require all physicians and staff to be vaccinated by the end of september. >> vaccines work, they are effective. and we as a health care delivery system want to model for you what a fully vaccinated team looks like. once this surge is over, there will probably be other variants that come down the pike and we want to be prepared this time. >> denver's mayor the latest to require all city workers to be vaccinated. that is about 10,000 people. san francisco and other bay area counties are reinstating an indoor mask mandate. that means nearly half of california's population of 40 million will now have to wear a mask vaccinated or not. >> and a little bit of good news. at san francisco's cable cars, they are back after being suspended last year because of the pandemic. they will be free all this