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  1. Symptoms of COVID-19 | COVID-19 | CDC

    Mar 10, 2025 · People with COVID-19 have a wide range of symptoms ranging from mild symptoms to severe illness. Symptoms may appear 2-14 days after exposure to the virus. Symptoms may start as …

  2. Testing for COVID-19 | COVID-19 | CDC

    Mar 10, 2025 · When you get tested Choose the right type of test for your circumstance. When using an antigen test, follow the recommendations provided by FDA and the test's manufacturer. If you do not, …

  3. Diabetes Testing | Diabetes | CDC

    May 15, 2024 · You'll fast (not eat) overnight before the test and have your blood drawn to measure your fasting blood sugar level. Then you'll drink the liquid and have your blood sugar level checked. These …

  4. Fit Testing | Personal Protective Equipment | CDC

    Feb 3, 2025 · The test is a pass/fail test that determines whether you can detect a test agent, such as through taste, smell, or an involuntary cough. The OSHA-accepted fit test protocols provide complete …

  5. A1C Test for Diabetes and Prediabetes | Diabetes | CDC

    May 15, 2024 · An A1C test helps you understand your diabetes. Find out how it works, and when to get tested.

  6. Testing for Cholesterol | Cholesterol | CDC

    May 15, 2024 · Because high cholesterol doesn't have symptoms, many people don't know their levels are high. The only way to know whether you have high cholesterol is to get your cholesterol checked. …

  7. Recommended Actions Based on Blood Lead Level

    Aug 21, 2025 · During well-child visits, check development to make sure age-appropriate milestones are being met. During well-child visits, discuss diet and nutrition with a focus on iron and calcium intake. …

  8. Getting Rid of Fleas | Fleas | CDC

    May 15, 2024 · Getting rid of fleas is a difficult process due to the long lifecycle of a flea. Moderate to severe infestations will take months to control and require a four-step process for complete elimination.

  9. Overview of Influenza Testing Methods | Influenza (Flu) | CDC

    Dec 19, 2025 · Rapid molecular assays are a kind of molecular influenza diagnostic test to detect influenza virus nucleic acids in upper respiratory tract specimens with high sensitivity (90-95%) and …

  10. Reducing Radon Levels in Your Home | Radon | CDC

    Feb 15, 2024 · After installing a radon reduction system, test your home again to make sure it is working. Consider retesting your home every two years to be sure radon levels remain low.