dose, second, vaccine, 2 vaccine, 2nd, administer, after, antibodies, bottle, certificate, coronavirus, covid, covid 19, disease, doctor, doses, drug, generic, hand, healthcare, holds, hospital, immunity, immunization, industry, infectious, injection, laboratory, medical, medication, medicine, nurse, passport, patient, pharmaceutical, pharmacology, phase, population, prevention, protection, research, second dose, second shot, shots, syringe, timing, vaccinating, vaccination, vaccine 2, vial