This updated interim guidance from CDC allows for people who are at highest risk for COVID-19 to receive a Pfizer-BioNTech COVID-19 booster shot to help increase their protection. Persons who have received a Moderna or Johnson & Johnson COVID-19 vaccine are not eligible to receive a booster under this guidance. The Western States Scientific Safety Review Workgroup has also approved these recomendations. The CDC recommends the following populations should receive a booster shot 6 months following their second dose of their Pfizer-BioNTech COVID-19 vaccine: The CDC recommends the following populations may receive a booster shot 6 months following their second dose of their Pfizer-BioNTech COVID-19 vaccine: "Booster shots will become an important part of our local strategy to protect our most vulnerable community members and end the pandemic.