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 1 (MMWR week ending January 1, 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 52 (MMWR week ending January 1, 2022)
• COVID-19 Variant Surveillance Report Week 51 (MMWR week ending December 25, 2021)
• COVID-19 Variant Surveillance Report Week 50 (MMWR week ending December 18, 2021)
• COVID-19 Variant Surveillance Report Week 49 (MMWR week ending December 11, 2021)
• COVID-19 Variant Surveillance Report Week 48 (MMWR week ending December 4, 2021)
• COVID-19 Variant Surveillance Report Week 47 (MMWR week ending November 27, 2021)
• COVID-19 Variant Surveillance Report Week 46 (MMWR week ending November 20, 2021)
• COVID-19 Variant Surveillance Report Week 45 (MMWR week ending November 13, 2021)
• COVID-19 Variant Surveillance Report Week 44 (MMWR week ending November 6, 2021)
• COVID-19 Variant Surveillance Report Week 43 (MMWR week ending October 30, 2021)
• COVID-19 Variant Surveillance Report Week 42 (MMWR week ending October 23, 2021)
• COVID-19 Variant Surveillance Report Week 41 (MMWR week ending October 16, 2021)
• COVID-19 Variant Surveillance Report Week 40 (MMWR week ending October 9, 2021)
• COVID-19 Variant Surveillance Report Week 39 (MMWR week ending October 2, 2021)
• COVID-19 Variant Surveillance Report Week 38 (MMWR week ending September 25, 2021)
• COVID-19 Variant Surveillance Report Week 37 (MMWR week ending September 18, 2021)
• COVID-19 Variant Surveillance Report Week 36 (MMWR week ending September 11, 2021)
• COVID-19 Variant Surveillance Report Week 35 (MMWR week ending September 4, 2021)
• COVID-19 Variant Surveillance Report Week 34 (MMWR week ending August 28, 2021)
• COVID-19 Variant Surveillance Report Week 33 (MMWR week ending August 21, 2021)
• COVID-19 Variant Surveillance Report Week 32 (MMWR week ending August 14, 2021)
• COVID-19 Variant Surveillance Report Week 31 (MMWR week ending August 7, 2021)
• COVID-19 Variant Surveillance Report Week 30 (MMWR week ending July 31, 2021)
• COVID-19 Variant Surveillance Report Week 29 (MMWR week ending July 24, 2021)
• COVID-19 Variant Surveillance Report Week 28 (MMWR week ending July 17, 2021)
• COVID-19 Variant Surveillance Report Week 27 (MMWR week ending July 10, 2021)
• COVID-19 Variant Surveillance Report Week 26 (MMWR week ending July 3, 2021)
• COVID-19 Variant Surveillance Report Week 25 (MMWR week ending June 26, 2021)
• COVID-19 Variant Surveillance Report Week 24 (MMWR week ending June 19, 2021)
• COVID-19 Variant Surveillance Report Week 23 (MMWR week ending June 12, 2021)
• COVID-19 Variant Surveillance Report Week 22 (MMWR week ending June 5, 2021)
• COVID-19 Variant Surveillance Report Week 21 (MMWR week ending May 29, 2021)
• COVID-19 Variant Surveillance Report Week 20 (MMWR week ending May 22, 2021)
• COVID-19 Variant Surveillance Report Week 19 (MMWR week ending May 15, 2021)
• COVID-19 Variant Surveillance Report Week 18 (MMWR week ending May 8, 2021)

CALI Reports: 2021, 2020