30:43

Dr. Talmadge King Jr. from UCSF explains COVID-19 symptoms, testing, and trends from July 2020. Most people show symptoms within 12 days. He highlights stark disparities: 95% of positive cases in UCSF's Mission District were Latinx residents. Prevention comes down to three things: wear a mask, wash hands, watch distance.

Questions this video answers

Late 2019

Around 4–5 days (can extend to 14 days); ~98% symptomatic within first 12 days.

PCR (nucleic acid) from nasal/throat swabs for current infection; serology measuring IgM and IgG in blood for prior infection.

Almost 4,000 people tested; 83 positive tests.

95% of the positive tests were among Hispanics/Latinos.

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