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.

July 20, 2021


Guillain-Barré Syndrome after J & J COVID-19 Vaccine

On July 13, 2021, the FDA announced an update to the Johnson & Johnson (J&J) COVID-19 vaccine EUA fact sheet to include a warning about Guillain-Barré syndrome (GBS). Based on an analysis of Vaccine Adverse Event Reporting (VAERS) data, there have been 100 preliminary reports of GBS following vaccination with the J & J vaccine. These cases have largely been reported about two weeks after vaccination and mostly in males, many aged 50 years and older.   

Clinicians should inquire about recent J & J COVID-19 vaccination in any patient presenting with signs or symptoms consistent with GBS (i.e. weakness or tingling sensations, especially in the legs or arms, that are worsening and spreading to other parts of the body; difficulty walking or with facial movements, including speaking, chewing or swallowing; double vision or inability to move the eyes; difficulty with bladder control or bowel function).

July 08, 2021


Excessive Heat Warning for the Bay Area

The National Weather Service has posted an excessive heat warning and temperatures in parts of Alameda County are expected to exceed 100 degrees Fahrenheit this weekend. Providers are encouraged to remind their clients to stay hydrated and stay indoors, if possible, and monitor for warning signs of health-related illness.

July 06, 2021


Multistate Investigation of Non-travel Associated Burkholderia pseudomallei Infections (Melioidosis)

On June 30, 2021, the Centers for Disease Control and Prevention (CDC) issued a health advisory to notify clinicians and caregivers that they, the Kansas Department of Health and Environment, the Texas Department of State Health Services, and the Minnesota Department of Health are investigating three cases of Burkholderia pseudomallei (melioidosis) infections. Symptoms of melioidosis are varied and nonspecific and may include pneumonia, abscess formation, and/or blood infections. Due to its nonspecific symptoms, melioidosis can initially be mistaken for other diseases such as tuberculosis, and proper treatment may be delayed.

June 10, 2021


Increased Interseasonal Respiratory Syncytial Virus (RSV) Activity in Parts of the Southern United States

On June 10th, the Centers for Disease Control and Prevention (CDC) issued a health advisory to notify clinicians and caregivers about increased interseasonal respiratory syncytial virus (RSV) activity across parts of the Southern United States. Due to this increased activity, CDC encourages broader testing for RSV among patients presenting with acute respiratory illness who test negative for SARS-CoV-2.

May 28, 2021


Myocarditis and Pericarditis after Receipt of mRNA COVID-19 Vaccines Among Adolescents and Young Adults

On May 28th, CDPH issued a Health Advisory about reported cases of myocarditis and pericarditis after receipt of mRNA COVID-19 vaccines among adolescents and young adults, which are being investigated by the CDC. COVID-19 immunization is still recommended for persons 12 years of age and older. All cases of myocarditis following receipt of COVID-19 vaccine, as well as other adverse events following vaccination, should be reported promptly to the CDC/FDA Vaccine Adverse Event Reporting System (VAERS)

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.

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