With the countrys third COVID fall approaching, the United States is expected to soon start ramping up its autumn COVID-19 booster campaign.
This years rollout will include something new. Moderna and Pfizer-BioNtech are working on bivalent boosters that include both the original vaccine formula and a component that targets the Omicron BA.4 and BA.5 subvariants of the coronavirus.
While the Biden administration has yet to reveal details of the rollout plan (expect more on that later), heres what we know so far.
The Omicron variant has overcome much of the protection against infection offered by two doses of the mRNA vaccines (such as Moderna and Pfizer-BioNTech).
A first booster restores some of that protection, but this wanes considerably within about three months after vaccination.
In spite of that, Dr. David Cutler, a family medicine physician at Providence Saint Johns Health Center in Santa Monica, Calif., told Healthline that the current vaccines continue to offer strong protection against severe illness and death.
This is especially true of the boosters.
In May 2022, unvaccinated people were six times more likely to die of COVID-19, compared to people vaccinated with at least a primary series (for most, two doses of the mRNA vaccines), according to the Centers for Disease Control and Prevention (CDC).
Among people 50 years and older, unvaccinated people were 29 times more likely to die of COVID-19 than those who had received the primary series and at least two booster doses, agency data showed.
The current COVID-19 vaccines and boosters are based on the original strain of the virus. As CDC data shows, these still offer strong protection against severe disease caused by Omicron.
However, in order to better target the variants likely to be circulating in the fall, the Food and Drug Administration (FDA) asked vaccine makers in June 2022 to update their boosters to include a component that targets the currently circulating Omicron BA.4 and BA.5 subvariants.
We think the Omicron-specific boosters will improve immunity against the existing Omicron variants. This may be particularly helpful during the anticipated winter surge, Dr. Jimmy Johannes, a pulmonologist and critical care medicine specialist at MemorialCare Long Beach Medical Center in California, told Healthline.
However, not all scientists agree that Omicron-specific boosters will provide greater protection than the current ones.
Cutler thinks the strongest benefit of Omicron-specific boosters will be for people who are unvaccinated or have not received the full primary series and any booster(s) for which they are eligible.
One problem with choosing which booster to use in the fall is its impossible to know for certain which variants will be circulating by then, although some experts expect it to be a descendant of one of the currently circulating Omicron variants.
Data presented at an FDA vaccine advisory committee meeting in June 2022, though, suggests that vaccination with a variant-specific booster such as one targeting Omicron might lead to a broadened antibody response against the coronavirus.
Data from Moderna shows the potential for this kind of broader immune response. The companys bivalent Omicron BA.1 booster also produced a higher level of neutralizing antibodies against BA.4 and BA.5 than the original booster, according to preliminary data.
On August 15, the United Kingdoms Medicines and Healthcare Products Regulatory Agency approved Modernas bivalent Omicron BA.1 booster for use in adults.
The Moderna and Pfizer-BioNTech boosters based on the original strain of the coronavirus are currently available for anyone who is eligible for a first or second booster.
The bivalent boosters from those companies are expected to be available in early to mid-September, Dr. Ashish Jha, White House COVID-19 response team coordinator, said in a virtual discussion with the U.S. Chamber of Commerce Foundation on August 16.
Before these boosters can be rolled out, though, the FDA will need to authorize them and the CDC will need to sign off on their use.
The fourth vaccine in the country, Novavaxs protein-based vaccine, was authorized by the FDA on July 13, 2022 for use as a two-dose primary series. This vaccine is based on the original strain of the coronavirus.
The company announced the next month that it had applied for FDA authorization of this vaccine as a booster. It is also testing an Omicron-specific vaccine and a bivalent vaccine that targets Omicron and the original strain, the company said in a release.
Everyone currently eligible for a COVID-19 booster will still be eligible in the fall, including:
Johannes said anyone at risk of severe COVID-19, or complications of a coronavirus infection, should consider getting boosted when the bivalent vaccine is available.
This includes older adults, as well as those with chronic medical conditions such as heart disease, liver or kidney disease, a chronic respiratory condition, cancer, an immune compromising condition, high blood pressure or diabetes.
The Biden administration is also expected to open up second boosters this fall to adults under age 50 when the bivalent vaccines are available. This expansion of eligibility was put on hold when vaccine makers said they could deliver the bivalent vaccines in early fall.
When the bivalent boosters are available in the fall, these will be used for all booster shots in the United States, including first and second boosters.
Pregnant women are also eligible for boosters.
The [COVID-19 mRNA] vaccines have now been given to tens of millions of pregnant women. They are extremely safe, said Jha during the online Chamber of Commerce call. We have seen little to no side effects [in pregnant women], the same side effects that most of us get the sore arm, sometimes 24 hours of feeling fatigued or a little bit run down.
Bolstering the safety profile of these vaccines, a large study from Canada published August 17, 2022, in The BMJ found that women who received a COVID-19 vaccine during pregnancy did not have a higher risk of having a preterm birth, a baby who was small for their gestational age at birth, or a stillbirth.
No details are available yet on the fall booster rollout, but it will likely be similar to the initial booster release last year, with vaccines mainly available at doctors offices and pharmacies. Some mass vaccinations may also happen in certain locations.
To find a vaccination site near you, check out the federal Vaccines.gov or your states COVID-19 vaccine website.
Its difficult to know what the coronavirus will do in the fall will there be a large spike early in September or will a new variant emerge? In addition, theres no guarantee that the bivalent vaccines will definitely be available in September.
As a result, the CDC recommends getting boosted as soon as you are eligible, with whichever booster is available. This is especially important for adults 50 years and older or those with compromised immune systems.
It can take one to two weeks after receiving a booster for your immune system to be fully primed. So if you are eligible now and get boosted, you will be better protected should cases surge as we head into the fall and winter.
You can always get the bivalent vaccine when it is available. Jha said you will want to space out those two boosters at least a little bit, probably 4 to 8 weeks.
The CDC may also weigh in on the timing between boosters when it reviews the data on the Omicron-specific boosters.
Jha said if you are planning on getting the seasonal flu shot this fall, you can definitely get this alongside a COVID-19 booster.
The CDC recommends that people get vaccinated against the flu by the end of October to ensure they have strong immune protection at the peak of the flu season, which generally happens in February.
Scientists dont know yet if the coronavirus that causes COVID-19 will follow a similar seasonal pattern, but cases have tended to increase in colder parts of the country as people head indoors for the fall and winter.
Although the FDA asked vaccine makers to update their boosters to include an Omicron-specific component, it did not advise them yet to update the vaccine for the primary series.
This suggests that unvaccinated people will receive the original vaccine, which the agency said provides a base of protection against serious outcomes of COVID-19.
Read more here:
The Next COVID-19 Booster Shots Will Target Omicron: What to Know - Healthline
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