Both the Moderna and Pfizer-BioNTech vaccines are highly effective, safe, and recommended by health authorities such as the CDC, which does not endorse one over the other. The "better" vaccine depends on individual health factors, age, and personal preferences, as they have minor differences.
A booster shot with the Moderna vaccine offered older people better protection against COVID-19 if they had previously taken Pfizer jabs, researchers at the National Centre for Infectious Diseases (NCID) have found.
Two types of COVID-19 vaccines are recommended for use in the United States: mRNA vaccines (Moderna and Pfizer-BioNTech) and a protein subunit vaccine (Novavax). Vaccination is based on individual-based decision-making (also known as shared clinical decision-making).
Moderna uses the same mRNA technology as Pfizer-BioNTech and had a similarly high efficacy at preventing symptomatic disease when the companies applied for authorization. Status: Moderna's vaccine has been updated over time to target new virus variants.
Public health has also made it clear that it is safe to mix and match Pfizer and Moderna COVID vaccines for booster shots.
You generally cannot mix different vaccines in the same syringe, and while most non-live vaccines can be given together, there are key exceptions, such as specific pneumococcal vaccines (PCV13 and PPSV23) needing separation, and a 4-week interval between certain live vaccines like MMR and varicella for optimal immune response, with special rules for those with spleen issues or HIV.
Studies have shown that mixing vaccines of different platforms can result in higher IgG and neutralizing antibodies as well as more strong cellular immune response. 27 , 30 , 42 Furthermore, using heterologous COVID‐19 vaccines has resulted in higher neutralizing antibody levels against the VOC compared to the ...
How long do spike proteins last in the body? The Infectious Disease Society of America (IDSA) estimates that the spike proteins that were generated by COVID-19 vaccines last up to a few weeks, like other proteins made by the body.
symptoms of a severe allergic reaction, such as difficulty breathing, wheezing, a fast heartbeat, or if your child collapses • chest pain, pressure or discomfort • irregular heartbeat, skipped beats or 'fluttering' • fainting • shortness of breath, or pain with breathing • new or unexpected symptoms, or if you are ...
Spikevax (COVID-19 Vaccine, mRNA) 2025-2026 Formula is an updated vaccine indicated for active immunization to prevent COVID-19 caused by SARS-CoV-2 in individuals 65 years of age and older, or 6 months through 64 years at high risk for severe COVID-19.
Comirnaty, the mRNA vaccine developed by Pfizer-BioNTech, demonstrated very high effectiveness (around 95%) against SARS-CoV-2 infection in early clinical trials.
But thanks to the smallpox vaccine—which is 99.999 percent effective—the World Health Organization (WHO) declared smallpox as an eradicated disease in 1980, nearly 150 years after its first discovery.
The CDC recommends that all adults age 50 and older get pneumococcal vaccination. This vaccine helps protect you from getting a serious infection, including pneumonia. There are multiple forms of the pneumococcal vaccine: Talk to a health care provider to find out which is best for you.
Note: The Moderna bivalent BA. 1 and BA. 4/5 COVID-19 vaccines are no longer being administered in Australia; therefore, Moderna bivalent BA. 1 and BA.
The same study identified 29 deep venous thromboses (DVTs) associated with the Moderna vaccine, of which 12 also had pulmonary embolism; there were no reported deaths or fatal events but there were 13 DVTs with the Pfizer vaccine in the same study period [9].
AstraZeneca is no longer available in Australia
There was a link between the AstraZeneca vaccine and a rare but serious side effect called thrombosis with thrombocytopenia syndrome (TTS). TTS was very rare.
A national CDC survey of adults during June–July 2024 found that the most common reasons for non-vaccination during the 2023–24 respiratory virus season were concern about serious and unknown side effects for COVID-19 vaccine (40%) and lack of concern about getting sick for flu vaccine (37%) among adults aged ≥18 years ...
People who are fully or partially vaccinated can still become infected by the novel coronavirus, which is called a breakthrough infection. What can you expect if you're one of them?
Yancey said that for vaccines that “last a lifetime,” which include vaccines for measles or hepatitis B, the viruses themselves tend to be uniform when they replicate. “They replicate very faithfully, so if you have hepatitis B, every hepatitis B virus in your body looks identical,” Dr. Yancey said.
The immune response from a COVID-19 infection usually tamps down after 3-4 months, says Kawsar Talaat, MD, a vaccinologist and associate professor in the Department of International Health at the Johns Hopkins Bloomberg School of Public Health and the Johns Hopkins School of Medicine in Baltimore, Maryland.
People should not get two different types of pneumococcal vaccine (PCV13 and PPSV23) at the same time.
Additional potential adverse effects of COVID-19 vaccines are myocarditis and pericarditis, which involve inflammation of the heart muscle or the lining around the heart. These conditions occur more frequently in males younger than 30 years, particularly after the second dose of an mRNA vaccine.
least 4 weeks.
This would apply specifically to doses of MMR and varicella, if not administered on the same day. 4) If 2 different live injectable vaccines are given <28 days apart, the one given second should be repeated ≥ 28 days after the second or invalid dose.