coronavirus February 26, 2021 2:12 pm COVID-19 Cases on the Rise After Weeks of Decline Health experts say new strains could be behind the increase of cases. US & World Videos 1:31 CDC recommends updated Covid shot for everyone ages 6 months and up 0:52 Lifeguard shortage impacts LA County pool hours 2:17 LA County: Mask Mandate Could Return in Weeks 2:22 Avoiding a COVID Winter Surge