Lubbock Christian University

How do SARS-CoV-2 vaccines compare?

Manufacturer/Vaccine Efficacy based on trials Dosing Age Recommendation
Vaccines currently approved for use
Moderna, mRNA-1273 94.5% effective Two doses 4 weeks apart 18 years and up
Pfizer BioNTech 95% effective Two doses 3 weeks apart 16 years and up
Expected soon
AstraZeneca 70% Two doses 3 weeks apart Not yet available
Johnson & Johnson 97% One dose 18 – 59 years

Frequently Asked Questions

Centers for Disease Control Recommendations

PHASE I distribution: Already begun, projected to go through early summer ‘21

  • Phase 1a: Healthcare personnel and Long-term care facility residents
  • Phase 1b: Frontline essential workers and People age 75 years and older
  • Phase 1c: People age 65 through 74 years and People age 16 through 64 years with underlying medical conditions and Other essential workers

TX Dept of Health COVID-19 vaccine phases vary slightly: 1A Direct care providers, 1A Long-term care residents, 1B Persons 65+ or 16 with at least 1 chronic medical condition, including pregnancy.

It cannot.

You will not.


It will.

Immunity begins building after the 1st dose of the vaccine. A second shot is needed to get the most protection the vaccine can offer.

Read aditional information.