An earlier version of this episode was published with old audio. That version has been fixed, and we've also republished the correct audio here. For a while, the state wasn't doing much to monitor the spread of coronavirus variants in communities. That has changed, reporter Erin Allday says. More widespread genomic sequencing of the virus may help us respond more quickly to flare-ups, protect vulnerable communities and understand if vaccines are working. It's a breakthrough that may provide benefits even after the pandemic is over. | Unlimited Chronicle access: sfchronicle.com/pod Learn more about your ad choices. Visit megaphone.fm/adchoices

An earlier version of this episode was published with old audio. That version has been fixed, and we've also republished the correct audio here. For a while, the state wasn't doing much to monitor the spread of coronavirus variants in communities. That has changed, reporter Erin Allday says. More widespread genomic sequencing of the virus may help us respond more quickly to flare-ups, protect vulnerable communities and understand if vaccines are working. It's a breakthrough that may provide benefits even after the pandemic is over. | Unlimited Chronicle access: sfchronicle.com/pod Learn more about your ad choices. Visit megaphone.fm/adchoices