What Vaccines are Currently Available? In the United States, there are two vaccines currently authorized to prevent COVID-19, one produced by Pfizer-BioNTech COVID-19 vaccine and one by Moderna. Are The COVID Vaccines Effective? According to manufacturer Pfizer, their vaccine is reported to be 95% effective, while the Moderna vaccine has been reported to be 94.5% effective. How Is the Vaccine Administered? Both the Moderna and Pfizer-BioNTech vaccines are two separate shots t