Flu season over.

Adaptive Biotechnologies has developed a clinical test called T-Detect COVID Test that can identify a T-cell response to the SARS-CoV-2 virus, indicating recent or prior infection This study aims to evaluate the potential cross-reactivity of the T-Detect COVID test in participants presenting with viral upper respiratory tract infections within the assay's intended use population and testing positive for seasonal coronavirus.

Prospective ascertainment of a minimum of 10 individuals exhibiting symptoms of viral upper respiratory tract infections, between the ages of 18-89 residing within the United States and being tested for SARS-CoV-2 infection during the 2021-2022 cold and flu season (~Nov. 2021 - May 2022).

Participants will complete an electronic screening questionnaire to determine eligibility, be consented, and scheduled for a study visit that will be conducted by study staff or mobile phlebotomist. The identification and recruitment of participants will protect privacy and be free of undue influence. Biological samples, including blood samples and nasopharyngeal swabs, will be collected via mobile phlebotomy in participant's homes with proper safety precautions in place. Study metadata and questionnaire information will be self-reported and/or recorded by study staff as applicable.

Inclusion Criteria:

1. Exhibiting viral upper respiratory infection symptoms during the symptomatic phase of infection and tested positive for a common seasonal coronavirus (NL63, 229E, OC43, and HKU1) at time of diagnosis for initial symptoms
2. Available for specimen collection greater than 14 days and less than 100 days after first exhibiting symptoms of confirmed seasonal coronavirus infection.
3. Male and female participants of any race and ethnicity between 18 to 89 years of age (inclusive) at the time of enrollment in the study
4. Able to communicate with the investigator, understand, and comply with the requirements of the study

Exclusion criteria:

1. Did not develop symptoms related to their diagnosed seasonal coronavirus infection
2. Prior diagnosis of COVID-19 or any positive test result for SARS-CoV-2 infection or antibodies test
3. Cohabitated with or has had significant exposure (per the Center for Disease Control guidelines) to another individual with known COVID-19
4. Protected populations including pregnant women, prisoners, mentally disabled persons, and wards-of-the state.
5. Any significant condition, laboratory abnormality, or psychiatric illness that would prevent the participant from safely participating in the study
6. Donated more than 500cc or 1 pint of blood in the past 60 days prior to the study blood draw
7. Received a COVID-19 vaccine, including a single dose of a multiple dose vaccine regimen
8. Participated in a COVID-19/SARS-CoV-2 study or received a SARS-CoV-2 antibody, or other SARS-CoV-2 therapeutic investigational drug or compound that will impact results of the study at the discretion of the investigator, such as but not limited to a SARS-CoV-2 antibody, therapeutic, or other medication that may impact the person's immune response

Recruiting individuals ages 18-89 at the time of screening are exhibiting symptoms compatible with a viral upper respiratory tract infection and obtain negative test result for SARS-CoV-2. Eligible participants must also test positive for one of the following common seasonal coronaviruses: NL63, 229E, OC43, and HKU1 via Respiratory Panel test.