SOLANO COUNTY, Calif. — The first case of someone testing positive for both COVID-19 and the flu at the same time has been reported in Solano County, according to health officials. Solano County Public Health says getting either disease can weaken the immune system, and officials urge residents to get a flu shot as soon as possible. “With the likelihood of both COVID-19 and seasonal flu activity this winter, contracting either disease may weaken your immune system and make you more susceptible to the other disease,” said Solano County Health Officer Bela T. Matyas. “Getting a flu vaccine this year...