Centers for Disease Control and Prevention.
Moderna COVID-19 vaccine: Storage and handling summary. Pfizer-BioNTech COVID-19 vaccine: Storage and handling summary. Interim clinical considerations for use of mRNA COVID-19 vaccines currently authorized in the United States. Vaccines and related biological products advisory committee meeting. Seek immediate medical care if you have weakness or tingling sensations, difficulty walking, difficulty with facial movements, double vision, and difficulty with bladder control. Rarely, some people may develop Guillain-Barre syndrome after getting the vaccine. Possible severe symptoms include shortness of breath, persistent stomach pain, severe or persistent headache, blurred vision, chest pain, leg swelling, easy bruising, and tiny red spots on the skin. Research suggests there isn’t an increased risk for this disorder after mRNA COVID-19 vaccination. Nearly all of those affected have been women ages 18 to 49.Īs a result, the CDC recommends getting an mRNA COVID-19 vaccine over getting the Janssen/Johnson & Johnson COVID-19 vaccine. Use of the Janssen/Johnson & Johnson COVID-19 vaccine might increase the risk of a rare and serious blood clotting disorder. Note: If you received this vaccine within the last three weeks and are experiencing any unexplained new severe symptoms, seek emergency care. Injection site pain, fatigue, headache, muscle pain, chills, fever and nausea The bivalent booster can be given at least two months after the last shot. People age 5 and older who have a weakened immune system and have had all recommended doses of the Moderna, Pfizer-BioNTech or Novavax COVID-19 vaccines can get an updated, or bivalent, booster dose of the updated Pfizer-BioNTech or Moderna COVID-19 bivalent vaccines. Kids ages 6 months through 5 years who got the Moderna COVID-19 vaccine can get an updated, Moderna COVID-19 bivalent vaccine booster. An additional primary shot might improve their protection against the COVID-19 virus. People with weakened immune systems might not develop enough immunity after vaccination with two doses of an mRNA COVID-19 vaccine. The CDC recommends an additional primary shot of an mRNA COVID-19 vaccine (at least 28 days after the second dose) for some people with weakened immune systems, such as those who have had an organ transplant. Two doses are needed for ages 6 months through age 17, four to eight weeks apart Two doses are needed for ages 18 and up, 28 days apart (or up to six weeks apart, if needed) in the U.S. People age 5 and older who have a weakened immune system and have had all recommended doses of a COVID-19 vaccine can get an updated, or bivalent, booster dose of the Pfizer-BioNTech COVID-19 vaccine. People 18 and older may also get a Novavax booster based on the original virus strain six months after their last shot. People can get the booster shot at least two months after their last shot. People age 6 and older can choose between the Pfizer-BioNTech and the Moderna COVID-19 bivalent vaccine booster. 
People ages 5 and older who had all recommended doses of a COVID-19 vaccine can get the Pfizer-BioNTech COVID-19 updated, or bivalent, booster. The CDC recommends an additional primary shot of an mRNA COVID-19 vaccine (at least 28 days after the second dose) for some people age 5 and older with weakened immune systems, such as those who have had an organ transplant. Some protection provided after the first dose Three doses are needed for age 6 months through age 4, with the first two shots given 3 to 8 weeks apart and the third shot at least eight weeks after the second shot
Two doses are needed, 21 days apart (or up to six weeks apart, if needed) in the U.S.
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