可以的，我写信给cdc，他们回直接打booster People who were vaccinated outside the United States and who completed the primary series with a WHO-listed vaccine and have not yet received a booster should receive a booster of an mRNA COVID-19 vaccine (Pfizer-BioNTech or Moderna) at least 5 months after their last dose of a COVID-19 vaccine. Some people should receive a second booster using an mRNA COVID-19 vaccine. People who received a COVID-19 vaccine that is FDA-authorized, FDA-approved, or listed for emergency use by WHO as their first booster should receive a second booster if eligible and their first booster was at least 4 months ago.
我爸身体不好 算有基础疾病 我想防重症
可以的，我写信给cdc，他们回直接打booster
People who were vaccinated outside the United States and who completed the primary series with a WHO-listed vaccine and have not yet received a booster should receive a booster of an mRNA COVID-19 vaccine (Pfizer-BioNTech or Moderna) at least 5 months after their last dose of a COVID-19 vaccine.
Some people should receive a second booster using an mRNA COVID-19 vaccine. People who received a COVID-19 vaccine that is FDA-authorized, FDA-approved, or listed for emergency use by WHO as their first booster should receive a second booster if eligible and their first booster was at least 4 months ago.