Communicable Disease Service

The COVID-19 Weekly Activity Report provides data on COVID-19 transmission risk by six regions. This report is posted on Thursdays and uses Morbidity and Mortality Weekly Report (MMWR) dates, which are from Sunday to Saturday. MMWR dates are commonly used by the Centers for Disease Control and Prevention (CDC) to standardize weekly reporting across years.

• COVID-19 Activity Report Week 19 (MMWR week ending May 14, 2022)
• COVID-19 Activity Report Week 18 (MMWR week ending May 7, 2022)
• COVID-19 Activity Report Week 17 (MMWR week ending April 30, 2022)
• COVID-19 Activity Report Week 16 (MMWR week ending April 23, 2022)
• COVID-19 Activity Report Week 15 (MMWR week ending April 16, 2022)
• COVID-19 Activity Report Week 14 (MMWR week ending April 9, 2022)
• COVID-19 Activity Report Week 13 (MMWR week ending April 2, 2022)
• COVID-19 Activity Report Week 12 (MMWR week ending March 26, 2022)
• COVID-19 Activity Report Week 11 (MMWR week ending March 19, 2022)
• COVID-19 Activity Report Week 10 (MMWR week ending March 12, 2022)
• COVID-19 Activity Report Week 9 (MMWR week ending March 5, 2022)
• COVID-19 Activity Report Week 8 (MMWR week ending February 26, 2022)
• COVID-19 Activity Report Week 7 (MMWR week ending February 19, 2022)
• COVID-19 Activity Report Week 6 (MMWR week ending February 12, 2022)
• COVID-19 Activity Report Week 5 (MMWR week ending February 5, 2022)
• COVID-19 Activity Report Week 4 (MMWR week ending January 29, 2022)
• COVID-19 Activity Report Week 3 (MMWR week ending January 22, 20222)
• COVID-19 Activity Report Week 2 (MMWR week ending January 15, 2022)
• COVID-19 Activity Report Week 1 (MMWR week ending January 8, 2022)

The COVID-19 Variant Surveillance Report includes the cumulative summary of all sequencing results reported by commercial labs and the Public Health and Environmental Laboratories (PHEL) that have been submitted for surveillance purposes.

• COVID-19 Variant Surveillance Report Week 16 (MMWR week ending April 23, 2022)
• COVID-19 Variant Surveillance Report Week 15 (MMWR week ending April 16, 2022)
• COVID-19 Variant Surveillance Report Week 14 (MMWR week ending April 9, 2022)
• COVID-19 Variant Surveillance Report Week 13 (MMWR week ending April 2, 2022)
• COVID-19 Variant Surveillance Report Week 12 (MMWR week ending March 26, 2022)
• COVID-19 Variant Surveillance Report Week 11 (MMWR week ending March 19, 2022)
• COVID-19 Variant Surveillance Report Week 10 (MMWR week ending March 12, 2022)
• COVID-19 Variant Surveillance Report Week 9 (MMWR week ending March 5, 2022)
• COVID-19 Variant Surveillance Report Week 8 (MMWR week ending February 26, 2022)
• COVID-19 Variant Surveillance Report Week 7 (MMWR week ending February 19, 2022)
• COVID-19 Variant Surveillance Report Week 6 (MMWR week ending February 12, 2022)
• COVID-19 Variant Surveillance Report Week 5 (MMWR week ending February 5, 2022)
• COVID-19 Variant Surveillance Report Week 4 (MMWR week ending January 29, 2022)
• COVID-19 Variant Surveillance Report Week 3 (MMWR week ending January 22, 2022)
• COVID-19 Variant Surveillance Report Week 2 (MMWR week ending January 15, 2022)
• COVID-19 Variant Surveillance Report Week 1 (MMWR week ending January 8, 2022)

CALI Reports: 2021, 2020 

Variant Reports: 2021