1. previous infection with sars-cov-2. 2. receipt of any vaccine for the prevention of covid-19 (single or multiple doses). 3. a sars-cov-2 infection symptom score greater than 0 in any of the 4 catergories (fever, cough, shortness of breath or fatigue) at the time of screening (ordinal scale for clinical improvement score of 0). 4. known history of chronic pulmonary disease (e.g., asthma \[including atopic asthma, exercise-induced asthma, or asthma triggered by respiratory infection\], chronic pulmonary disease, pulmonary fibrosis, copd), pulmonary hypertension, or heart failure. 5. any condition which, in the opinion of the principal investigator, would prevent full participation

1. previous infection with sars-cov-2. 2. receipt of any vaccine for the prevention of covid-19 (single or multiple doses). 3. a sars-cov-2 infection symptom score greater than 0 in any of the 4 catergories (fever, cough, shortness of breath or fatigue) at the time of screening (ordinal scale for clinical improvement score of 0). 4. known history of chronic pulmonary disease (e.g., asthma \[including atopic asthma, exercise-induced asthma, or asthma triggered by respiratory infection\], chronic pulmonary disease, pulmonary fibrosis, copd), pulmonary hypertension, or heart failure. 5. any condition which, in the opinion of the principal investigator, would prevent full participation

previous infection with sars-cov-2. receipt of any vaccine for the prevention of covid-19 (single or multiple doses). a sars-cov-2 infection symptom score greater than 0 in any of the 4 catergories (fever, cough, shortness of breath or fatigue) at the time of screening (ordinal scale for clinical improvement score of 0). known history of chronic pulmonary disease (e.g., asthma [including atopic asthma, exercise-induced asthma, or asthma triggered by respiratory infection], chronic pulmonary disease, pulmonary fibrosis, copd), pulmonary hypertension, or heart failure. any condition which, in the opinion of the principal investigator, would prevent full participation

previous infection with sars-cov-2. receipt of any vaccine for the prevention of covid-19 (single or multiple doses). a sars-cov-2 infection symptom score greater than 0 in any of the 4 catergories (fever, cough, shortness of breath or fatigue) at the time of screening (ordinal scale for clinical improvement score of 0). known history of chronic pulmonary disease (e.g., asthma [including atopic asthma, exercise-induced asthma, or asthma triggered by respiratory infection], chronic pulmonary disease, pulmonary fibrosis, copd), pulmonary hypertension, or heart failure. any condition which, in the opinion of the principal investigator, would prevent full participation

1. previous infection with sars-cov-2. 2. receipt of any vaccine for the prevention of covid-19 (single or multiple doses). 3. a sars-cov-2 infection symptom score greater than 0 in any of the 4 catergories (fever, cough, shortness of breath or fatigue) at the time of screening (ordinal scale for clinical improvement score of 0). 4. known history of chronic pulmonary disease (e.g., asthma [including atopic asthma, exercise-induced asthma, or asthma triggered by respiratory infection], chronic pulmonary disease, pulmonary fibrosis, copd), pulmonary hypertension, or heart failure. 5. any condition which, in the opinion of the principal investigator, would prevent full participation

1. previous infection with sars-cov-2. 2. receipt of any vaccine for the prevention of covid-19 (single or multiple doses). 3. a sars-cov-2 infection symptom score greater than 0 in any of the 4 catergories (fever, cough, shortness of breath or fatigue) at the time of screening (ordinal scale for clinical improvement score of 0). 4. known history of chronic pulmonary disease (e.g., asthma [including atopic asthma, exercise-induced asthma, or asthma triggered by respiratory infection], chronic pulmonary disease, pulmonary fibrosis, copd), pulmonary hypertension, or heart failure. 5. any condition which, in the opinion of the principal investigator, would prevent full participation

1. previous infection with sars-cov-2. 2. a sars-cov-2 infection symptom score greater than 0 in any of the 4 catergories (fever, cough, shortness of breath or fatigue) at the time of screening (ordinal scale for clinical improvement score of 0). 3. known history of chronic pulmonary disease (e.g., asthma [including atopic asthma, exercise-induced asthma, or asthma triggered by respiratory infection], chronic pulmonary disease, pulmonary fibrosis, copd), pulmonary hypertension, or heart failure. 4. any condition which, in the opinion of the principal investigator, would prevent full participation

1. previous infection with sars-cov-2. 2. a sars-cov-2 infection symptom score greater than 0 in any of the 4 catergories (fever, cough, shortness of breath or fatigue) at the time of screening (ordinal scale for clinical improvement score of 0). 3. known history of chronic pulmonary disease (e.g., asthma [including atopic asthma, exercise-induced asthma, or asthma triggered by respiratory infection], chronic pulmonary disease, pulmonary fibrosis, copd), pulmonary hypertension, or heart failure. 4. any condition which, in the opinion of the principal investigator, would prevent full participation