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  1. Jul 3, 2024 · When you should test will depend on whether or not you are experiencing COVID-19 symptoms. If you have COVID symptoms: Take a PCR test if you plan to use only one test. An antigen test is reliable for a positive result, but a negative result is more accurate with a PCR.

  2. Jun 21, 2024 · Together the omicron variants make up nearly all COVID-19 infections in the United States. People who are up to date on their vaccines can get breakthrough infections. They can then spread the virus to others. But the COVID-19 vaccines can work to prevent severe illness.

  3. Jun 21, 2024 · If you develop symptoms days after receiving a negative PCR result, you might consider an at-home rapid test or contacting your healthcare provider for a second PCR test, especially if you have severe symptoms or you are at high-risk for infections or COVID-19 complications.

    • Lana Barhum
  4. Jul 6, 2024 · A breakthrough COVID-19 infection is when a fully vaccinated person contracts SARS-CoV-2, the COVID-19 virus. As the number of vaccinated people increases, more people will have a breakthrough infection. This article covers COVID-19 vaccination, testing, and when to be concerned about a breakthrough infection. Yuichiro Chino / Getty Images.

  5. 4 days ago · Symptoms of COVID-19. Some less common symptoms of COVID-19 can be relatively non-specific; however the most common symptoms are fever, dry cough, and loss of taste and smell. Among those who develop symptoms, approximately one in five may become more seriously ill and have difficulty in breathing.

  6. Jun 27, 2024 · An antigen is a protein found in viruses like SARS-CoV-2, which causes COVID. The body creates antibodies in response to help fight off the virus. In contrast, a polymerase chain reaction...

  7. Jun 20, 2024 · Long COVID refers to new or recurring symptoms that occur four or more weeks after an infection with SARS-CoV-2, the virus that causes COVID-19. Related Terms: COVID-19 (Coronavirus Disease 2019)