F1 - Pregnant patients who shall be tested during the peripartum period
F2 - Dialysis patients
F3 - Patients who are immunocompromised, such as those who have HIV/AIDS, Inherited diseases that are affect the immune system
F4 - Patients undergoing chemotherapy or radiology
F5 - Patients who will undergo elective surgical procedures with high risk for transmissions
F6 - Any person who have had organ transplants, or have had bone marrow or stem cell transplant in the past 6 months
F7 - Any person who is about to be admitted in enclosed institutions such as jails, penitentiaries, and mental institutions