inclusion criteria: * able to donate a small amount of blood, * planning to receive an initial mrna severe acute respiratory distress syndrome coronavirus 2 vaccine, * between 18-64 years of age, * regularly participate in some form of exercise two or more times per week, including at least one session equal to or greater than 50 minutes exercise sessions or walk three or more times per week with at least one session equal to or greater than 50 minutes. * can safely perform 90 minutes of light to moderate intensity exercise (walk, walk/jog, or jog) based on american college of sports medicine exercise participation guidelines

inclusion criteria: * able to donate a small amount of blood, * planning to receive an initial mrna severe acute respiratory distress syndrome coronavirus 2 vaccine, * between 18-64 years of age, * regularly participate in some form of exercise two or more times per week, including at least one session equal to or greater than 50 minutes exercise sessions or walk three or more times per week with at least one session equal to or greater than 50 minutes. * can safely perform 90 minutes of light to moderate intensity exercise (walk, walk/jog, or jog) based on american college of sports medicine exercise participation guidelines

inclusion criteria: able to donate a small amount of blood, planning to receive an initial mrna severe acute respiratory distress syndrome coronavirus 2 vaccine, between 18-64 years of age, regularly participate in some form of exercise two or more times per week, including at least one session equal to or greater than 50 minutes exercise sessions or walk three or more times per week with at least one session equal to or greater than 50 minutes. can safely perform 90 minutes of light to moderate intensity exercise (walk, walk/jog, or jog) based on american college of sports medicine exercise participation guidelines

inclusion criteria: able to donate a small amount of blood, planning to receive an initial mrna severe acute respiratory distress syndrome coronavirus 2 vaccine, between 18-64 years of age, regularly participate in some form of exercise two or more times per week, including at least one session equal to or greater than 50 minutes exercise sessions or walk three or more times per week with at least one session equal to or greater than 50 minutes. can safely perform 90 minutes of light to moderate intensity exercise (walk, walk/jog, or jog) based on american college of sports medicine exercise participation guidelines

inclusion criteria: able to donate a small amount of blood, planning to receive either the initial covid vaccine immunization series or the booster dose (3rd dose) of an mrna-based severe acute respiratory distress syndrome coronavirus 2 vaccine, between 18-70 years of age, regularly participate in some form of exercise, including longer duration exercise sessions can safely perform 90 minutes of light to moderate intensity exercise (walk, walk/jog, or jog) based on american college of sports medicine exercise participation guidelines

inclusion criteria: able to donate a small amount of blood, planning to receive either the initial covid vaccine immunization series or the booster dose (3rd dose) of an mrna-based severe acute respiratory distress syndrome coronavirus 2 vaccine, between 18-70 years of age, regularly participate in some form of exercise, including longer duration exercise sessions can safely perform 90 minutes of light to moderate intensity exercise (walk, walk/jog, or jog) based on american college of sports medicine exercise participation guidelines

inclusion criteria: able to donate a small amount of blood, planning to receive a booster dose of an mrna-based severe acute respiratory distress syndrome coronavirus 2 vaccine, between 18-70 years of age, regularly participate in some form of exercise, including longer duration exercise sessions can safely perform 90 minutes of light to moderate intensity exercise (walk, walk/jog, or jog) based on american college of sports medicine exercise participation guidelines

inclusion criteria: able to donate a small amount of blood, planning to receive a booster dose of an mrna-based severe acute respiratory distress syndrome coronavirus 2 vaccine, between 18-70 years of age, regularly participate in some form of exercise, including longer duration exercise sessions can safely perform 90 minutes of light to moderate intensity exercise (walk, walk/jog, or jog) based on american college of sports medicine exercise participation guidelines