Episode 149: COVID Vaccines Update

Episode 149: COVID Vaccines UpdateFuture Dr. Williams presented an update on COVID-19 vaccines. This update is only for immunocompetent individuals, and it was recorded on August 24, 2023. Dr. Arreaza added comments and insight.  Written by John Williams, MS4, Ross University School of Medicine. Editing by Hector Arreaza, M.D.  You are listening to Rio Bravo qWeek Podcast, your weekly dose of knowledge brought to you by the Rio Bravo Family Medicine Residency Program from Bakersfield, California, a UCLA-affiliated program sponsored by Clinica Sierra Vista, Let Us Be Your Healthcare Home. This podcast was created for educational purposes only. Visit your primary care provider for additional medical advice.Currently, there are two types of vaccines that have been approved by the FDA:Moderna and Pfizer developed mRNA vaccines.Novavax developed a lesser-known protein subunit vaccine.As of May 6, 2023, the vaccine developed by Johnson & Johnson has expired and is not available in the U.S.Novavax: This vaccine contains pieces (proteins) of the virus that causes COVID-19, the spike protein plus an adjuvant. It works by activating the immune system against the spike protein, so it will be ready to fight the actual virus when you get infected. Regardless of vaccine type, the shots are administered in the upper arm and have been demonstrated, for most people, to be safe and effective. There have now been hundreds of million vaccines administered in the US alone and the effectiveness of the vaccine to reduce the risks of severe illness, hospitalization, and death has been well documented. The most common side effects consist of mild to moderate cases of fever, chills, headache, and tiredness that are self-resolving.What is new about COVID-19 Vaccines?The updated vaccine is known as “bivalent”. This term is important because it refers to the vaccine’s ability to confer protection against both the original COVID-19 virus as well as new variants Omicron BA.4 and BA.5. Rollout of the updated vaccine began in September 2022 for those aged 12 years and older and became widespread in March 2023 with approval granted for use in children aged 6 months – 4 years. Selected individuals over age 65 or those who are immunocompromised may receive additional doses to provide comparable and safe protection. The receipt of the updated vaccine supersedes any previous doses and provides coverage against the most recent known variants determined to be either most widespread or that have been projected to be more prevalent.Children aged 6 months – 4 years who received the original Pfizer vaccineThose who received either 2 or 3 doses of the original vaccine should receive 1 dose of the updated vaccine.Those who received 1 dose of the original vaccine should receive 2 doses of the updated vaccine.You are considered up to date if you have received 3 vaccine doses, including at least 1 updated dose.Children aged 5 years who received the original Pfizer vaccineThose who received 1+ doses of the original vaccine should receive 1 dose of the updated vaccine.You are considered up to date if you have received at least 1 updated dose.Children aged 6 months – 4 years who received the original Moderna vaccineThose who received either 2 or 1 dose(s) of the original vaccine should get 1 updated vaccine.Children aged 5 years who received the original Moderna vaccineThose who received either 2 or 1 dose(s) of the original vaccine should get 1 updated vaccine.Unvaccinated children 6 m-4 years should receive the new bi