Covid-19 March 21, 2022 7:52 am Wastewater Studies Can Predict Virus Spikes UCSD researchers have been predicting COVID-19 spikes by studying wastewater in the county. NBC 7’s Audra Stafford explains. US & World Videos 1:25 SDSU gives campus tour to local students 2:20 Audio details what happened moments before small plane crashed in El Cajon 0:46 San Diego's next police chief could be confirmed Monday 0:23 Names of two pandas coming to San Diego revealed 1:57 Small plane crashes into El Cajon neighborhood, pilot injured