Spirulina Oral Supplement for Enhancing Host Resilience to Virus Infection

Inclusion Criteria: * Ages 18-59 (study group 1) or ages 65 and above (study group 2) * Any chronic illness must be determined (by PI team) to be stable as evidenced by no changes in medical regimens within 30 days of enrollment. * Ability to comprehend the specific activities required to participate in the trial for which the participant is to be enrolled. Exclusion Criteria: * Any acute illness or significant injury within 30 days of enrollment. * Specific disease entities, which, in the opinion of the PI, could reasonably be assumed to have dysfunctional immune function as a component of their illness. These include HIV, AIDS, uncontrolled asthma, uncontrolled eczema, uncontrolled allergic rhinitis, uncontrolled urticaria, Rheumatoid arthritis, lupus, inflammatory bowel disease, multiple sclerosis, Type-1 diabetes mellitus, Guillain-Barr syndrome, Grave's disease, Hashimoto's thyroiditis, myasthenia gravis or vasculitis. * Active autoimmune diseases regardless of clinical stability. A history of autoimmune disease that is not considered active (i.e. no medical therapy for at least 1 year prior to enrollment) will not be excluded. * History of unstable chronic illness within 30 days of enrollment. * Unable/unwilling to commit to multiple research clinic visits which will be described in detail.