The Alameda County Public Health Department sends out Health Alerts, Advisories, and Updates regarding communicable disease outbreaks, immunization updates, and other public health concerns to Alameda County clinicians and other partners. See recent releases below.

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Health Alerts

ALERT conveys the highest level of importance; warrants immediate action or attention.
ADVISORY provides important information for a specific incident or situation; may not require immediate action.
UPDATE provides updated information regarding an incident or situation; unlikely to require immediate action.

May 25, 2021


Cases of Myocarditis/Pericarditis after Receipt of mRNA Vaccines

On May 17th, the CDC Vaccine Safety Technical (VaSt) Work Group released a statement on reports of myocarditis following mRNA vaccines. VaST concluded that there are relatively few reports of myocarditis to date and that these cases seem to occur:

  • predominantly in adolescents and young adults,
  • more often in males than females,
  • more often following dose 2 than dose 1, and
  • typically within 4 days after vaccination.

Please report cases of myocarditis or pericarditis after vaccination promptly to the U.S. Vaccine Adverse Events Reporting System (VAERS).

April 29, 2021


Detection and containment of Carbapenemase-producing Acinitobacter Baumanii

The purpose of this joint Health Advisory is to instruct clinicians in Alameda County to test and screen for Carbapenem-resistant Acinitobacter baumanii bacteria.

April 28, 2021


Revised Reporting Requirements for Suspect Variant SARS-CoV-2 Infections

The purpose of this Health Advisory is to inform clinicians in Alameda County about the changes in reporting for Variants of Concern, including:

(1) Definition of Vaccine Breakthrough Cases of Interest (VBCIs) and (2) Deletion of specific quarantine requirements for close contacts of persons with VOC infections.

This advisory was updated April 27, 2021.

April 21, 2021


Reporting cases of thrombosis with thrombocytopenia syndrome (TTS) after receipt of J&J vaccine

On April 21, 2021, the California Department of Public Health (CDPH) issued the following Health Advisory: Pause in administration of the Johnson & Johnson COVID-19 vaccine; Reporting of cases of thrombosis with thrombocytopenia syndrome (TTS) after receipt of Johnson & Johnson vaccine.

All cases of thrombosis with thrombocytopenia syndrome (TTS) following receipt of J &J COVID-19 vaccine, as well as other adverse events following vaccination, should be reported to the CDC/FDA Vaccine Adverse Event Reporting System (VAERS).

April 13, 2021


Cases of Cerebral Venous Sinus Thrombosis with Thrombocytopenia after Receipt of the Johnson & Johnson COVID-19 Vaccine

On April 13, 2021, the CDC issued the following alert about cases of cerebral venous sinus thrombosis with thrombocytopenia after receipt of the Johnson & Johnson COVID-19 vaccine.

Please see the full CDC Health Alert at the following link:

The California Department of Public Health (CDPH) issued a similar alert through the CAHAN (California Health Alert Network) Disease Notification.

February 22, 2021


Interim Quarantine Guidance for Vaccinated Health Care Personnel

CDC has recently released additional quarantine guidance for persons fully vaccinated against COVID-19.

The Alameda County Public Health Department (ACPHD) has updated Health Officer Order 20-06 (Blanket Isolation/Quarantine Order) to align with CDC recommendations, and developed the attached interim guidance for quarantine among vaccinated health care personnel.

December 02, 2020


Influenza and Respiratory Illness 2020-2021

The Health Advisory is designed to help Alameda County clinicians prepare for the influenza season, which generally occurs from November through April. This Health Advisory outlines several actions requested of Alameda County clinicians, emergency departments, pathologists and healthcare facilities.

November 20, 2020


Updates November 2, 2020 Health Alert

Health Officers for Alameda County and the City of Berkeley are updating their joint Health Officer order mandating that all licensed health care facilities in Alameda County and the City of Berkeley require their health care workers (HCW) to receive an annual influenza vaccination. This Order mandates that health care facilities implement a process for requiring HCW to receive vaccination unless a HCW can produce sufficient documentation to obtain a medical exemption. Unlike in previous years, mask wearing is not an adequate substitution for vaccination under this Order.

Health Officers for Alameda County and the City of Berkeley are clarifying their previous joint order (No. 20-16) mandating that all licensed health care facilities in Alameda County and the City of Berkeley require their health care workers (HCW) to receive an annual influenza vaccination. In accordance with previous years, this updated Order includes an exemption for HCW who opt to not receive influenza vaccination due to religious beliefs.

August 17, 2020


Updated COVID-19 Healthcare Provider Reporting Requirements for Alameda County - Replaces June 17, 2020 Health Advisory

This updated guidance for COVID-19 laboratory testing is intended to inform Alameda County Public Health Department (ACPHD) efforts to control the epidemic and aid decision-making by clinicians and other testing providers. The guidance identifies groups that should be prioritized for testing, but it is not a requirement to test in these groups. Testing decisions and policies must be flexible to account for ongoing limitations in testing resources and protective equipment. Clinical judgment should be used to guide testing of symptomatic1 persons. ACPHD typically issues additional testing guidance for certain settings and situations, including outbreaks.

August 17, 2020


COVID-19 Testing Guidance for Alameda County – Replaces May 12, 2020 Health Advisory

Positive real-time polymerase chain reaction (RT-PCR) tests and antigen  tests for current SARS-CoV-2 infection— not antibody— must be reported to the Alameda County Public Health Department (ACPHD).

August 07, 2020


Interim Guidance on Testing for SARS-CoV-2 before Non-Urgent Surgical, Dental, and Diagnostic Procedures

During the COVID-19 epidemic in Alameda County, urgent medical and dental procedures have continued in both outpatient and inpatient settings. On May 13, 2020, the Alameda County Public Health Department (ACPHD) released a Health Advisory encouraging medical and dental providers gradually to resume non-urgent clinical services, with several important caveats.

While there is active transmission of SARS-CoV-2 in Alameda County, ACPHD recommends that facilities, medical, and dental providers implement policies and strategies that include screening of all patients for symptoms of COVID-19 and selective preprocedural testing of patients undergoing non-emergent surgical, dental, or diagnostic procedures that may involve intubation or the generation of biological aerosols.


July 29, 2020


Discontinuation of Transmission-Based Precautions and Release from Home Isolation Guidance Following a COVID-19 Infection

This document describes updated guidance for releasing a person from home isolation or removing a patient or resident of a healthcare facility from Transmission-based Precautions for COVID-19. The test-based strategy, previously described as an option for ending isolation, should no longer be considered except in very specific circumstances and after consultation with an infectious disease expert.

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