If CDC Respiratory Activity Is High: Family and School Steps This Week

ByBrian “Weence” Bateman

CDC’s respiratory virus “activity levels” (based on emergency department data) and wastewater monitoring both aim to show whether viruses are circulating more than usual. Here’s how families and schools can use those signals this week—calmly and practically.

When CDC reports that respiratory virus activity is high in your area, it can be a useful “heads up” that more people are seeking care for respiratory illness. But these surveillance signals are not a way to predict which individuals will get sick or how severe illness will be for your child or family.

This week, you can use CDC’s two signals together—Respiratory Virus Activity Levels (from emergency department data) and wastewater monitoring—to guide everyday decisions for home and school.

What “high activity” means in CDC’s Respiratory Virus Activity Levels

CDC’s Respiratory Virus Activity Levels use an acute respiratory illness (ARI) measure built from emergency department (ED) information. CDC groups results into categories such as Very Low, Low, Moderate, High, and Very High.

In plain language, higher categories generally mean more respiratory illness activity is being seen among people who seek ED care compared with lower-activity periods. It reflects community patterns—not what will happen to any one person.

What it can’t tell you: Because these levels are based on care-seeking and other surveillance inputs, they do not guarantee outcomes for individuals.

Wastewater monitoring adds a second, separate signal (updated weekly)

CDC also monitors respiratory viruses in wastewater. This approach can detect evidence of virus circulating in a community, including infections that may not be severe enough to prompt urgent care right away.

CDC notes that wastewater results are reported in categories and updated on a schedule (including national updates on Fridays with the prior week’s results). Wastewater signals have helpful information, but they have limits too—some areas may have Limited/No Data, and results can be affected by which populations are represented.

How to use both signals together

Think of the two CDC dashboards as complementary:

  • ED-based Activity Levels reflect what’s showing up among people who seek emergency care.
  • Wastewater trends can offer an additional view of community spread, including evidence from people who aren’t captured by ED-based measures.

Together, they help families and schools answer a practical question: “Is community respiratory virus circulation likely higher than usual right now?”

What to do at home and in school this week

If your community is showing High or Very High activity, focus on simple steps that reduce spread when people are sick and protect higher-risk household members.

Keep children home when they’re clearly unwell

Use everyday school-health judgment, guided by the American Academy of Pediatrics (AAP). As general guidance, children should stay home if they:

  • Have a fever (AAP includes examples such as fever over 101°F within the past 24 hours)
  • Have had vomiting or diarrhea within the past 24 hours
  • Are not well enough to participate in class

Also follow your school district or local attendance rules.

Make prevention a routine—not a one-time scramble

When more respiratory viruses are circulating, prevention matters more. Consider making these habits “baseline” for your household:

  • Stay home when sick and avoid close contact with people who are ill.
  • Wash hands often and cover coughs/sneezes.
  • Support recommended vaccinations for your family (and check with a clinician if you’re unsure what’s up to date).

The goal is to reduce spread and protect those at higher risk—not to panic.

Extra caution for people at higher risk

CDC highlights that some people are more likely to experience severe respiratory virus illness. This can include older adults, young children, pregnant people, and people with certain medical conditions, weakened immune systems, or disabilities.

If someone at higher risk develops symptoms (or tests positive), CDC emphasizes the importance of promptly contacting a healthcare professional to discuss next steps such as testing and whether treatment may be appropriate. For some viruses, early care can matter; the safest approach is to talk quickly once symptoms start.

When to get help

If symptoms feel severe, worsening, or concerning—or if you’re caring for someone at higher risk—seek medical guidance promptly. For school-age decisions, start with the AAP stay-home guidance, and then align with your school’s attendance policies.

Sources

Editorial note: Weence articles are researched from cited public-health, medical, regulatory, journal, and reputable news sources and may be drafted with AI assistance. They are checked for source support, clarity, and safety guardrails before publication.

This article is for general informational purposes only and is not medical advice. Research findings can be early or incomplete, and health guidance can change. Always talk with a qualified healthcare professional about personal symptoms, diagnosis, medications, vaccines, screenings, or treatment decisions. If you think you may have a medical emergency, call emergency services right away.

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Brian “Weence” Bateman is a health and medical writer who covers public health updates, healthcare policy, and medical developments affecting communities across the United States. He works closely with dentists and healthcare providers and focuses on making complex medical information clear, accurate, and useful for everyday readers.