Health

Brazil coronavirus variant is now second most common in the US



PFIZER

WHEN WAS IT APPROVED? December 11, 2020 

WHO CAN GET IT? Anyone 16 or older

DOSAGE: 2 doses, given 21 days apart 

HOW DOES IT WORK? Uses messenger RNA to deliver a tiny bit of genetic code from the virus to ‘teach’ the body to make a protein that provoke antibody production  

HOW EFFECTIVE IS IT… 

AFTER 2 DOSES: 95% effective at preventing illness; 100% effective at preventing COVID-19 death; 87% effective at preventing hospitalization

AFTER FIRST DOSE: (not recommended) ~46% effective at preventing infection seven to 20 days later; 57% effective against against symptomatic illness; 72% effective at preventing death; 74% effective against hospitalization; 62% effective against severe illness (based on real-world data from Israel) 

AGAINST VARIANTS FROM…  

UK – B117: No significant impact 

South Africa – B135110% less effective; still protective 

Brazil  – P1: 10.4-fold weaker antibodies; still protective 

MODERNA 

WHEN WAS IT APPROVED? December 18, 2020 

WHO CAN GET IT? Anyone 18 or older

DOSAGE: 2 doses, given 28 days apart 

HOW DOES IT WORK? Uses messenger RNA to deliver a tiny bit of genetic code from the virus to ‘teach’ the body to make a protein that provoke antibody production  

HOW EFFECTIVE IS IT… 

AFTER 2 DOSES: 94% effective at preventing illness; 100% effective at preventing COVID-19 death; 89% effective at preventing hospitalization

AFTER FIRST DOSE: (not recommended) ~80% effective, based on trial data 

AGAINST VARIANTS FROM…  

UK – B117: No significant impact 

South Africa – B1351: 10% less effective; still protective 

Brazil  – P1: More data needed 

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JOHNSON & JOHNSON 

WHEN WAS IT APPROVED? February 27, 2021

WHO CAN GET IT? Anyone 18 or older

DOSAGE: 1 dose

HOW DOES IT WORK? Uses a harmless, inactivated cold virus to carry piece of spike protein into body to teach it to fight SARS-CoV-2 

HOW EFFECTIVE IS IT… 

AFTER SINGLE DOSE: 72% worldwide; 86% in the US  

AGAINST VARIANTS FROM…  

UK – B117: No significant impact 

South Africa – B1351: 64% effective

Brazil  – P1: 85% effective 



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