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Department of Health Services

Public Health Disease Control

Exposure Notices

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Report a Disease or Outbreak

To report a disease or outbreak to Sonoma County Public Health, call (707) 565-4567. All outbreaks must be reported.

Disease

Send an Exposure Notice for a single case?

Watch for Symptoms For:

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When to Report to Public Health

Chickenpox (Varicella)

Yes

21 days

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Report outbreaks only: ≥3 related cases.

Flu (Seasonal)

For an outbreak or widespread illness

4 days

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Report outbreaks and single cases only if child is hospitalized in ICU or dies.

Flu Toolkit »

Hand, Foot, Mouth Disease

Yes

5 days

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Report single case only if child is hospitalized or ≥5 related cases.

Measles

Yes

21 days

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Report immediately by phone

Meningococcal
(Neisseria meningitidis)

Yes

10 days

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Report immediately by phone

Mumps

Yes

25 days

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Report single case

RSV (Respiratory Syncytial Virus)

Yes

8 days

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Report only if there is a death in child <5 years old

Strep throat/Scarlet Fever

Yes

10 days

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Clusters only, defined as:

≥5 cases strep throat
≥3 cases scarlet fever

Viral Gastroenteritis or Norovirus

Yes for >2 related cases w/in 48 hours

72 hours

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Report outbreaks only: ≥ 2 related cases.

Norovirus Toolkit Schools »

Viral Meningitis

Yes

Varies

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Report single case

Whooping Cough/Pertussis

Yes

21 days

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Report single case

FAQs for Schools and Child Care


Prevention of Communicable Diseases

Flu: Keep Our School Healthy (English)Mantenga Nuetra Escuela Saludable (En español)

Flu/COVID/Respiratory Illness Toolkits and Vaccine Info Multilingual: Toolkits

Germ-Free Zone Multilingual: Germ-Free Zone

Flu and COVID-19 Vaccines: Superheroes Need Vaccine