Table 2.

Current vaccines authorized in the U.S for the inoculation against COVID-19 infection.

Company	Vaccine Type	Efficacy against Preventing COVID-19 Symptoms	Number of Doses	Protection after First Dose?	Age
Pfizer-BioNTech	mRNA	95%	2 doses, 21 days apart	Limited	12 years and older
Moderna	mRNA	94%	2 doses, 28 days apart	Limited	18 years and older
Janssen/Johnson & Johnson	Vector	66%	1 dose	Some protection 2 weeks following vaccination	18 years or older

Data were obtained from the Mayo Foundation for Medical Education and Research [49].