Dr. Fauci Just Said That Doing This Could Create More Strains of COVID

This seemingly harmless decision could lead to additional mutations of coronavirus.

There are currently multiple new strains of COVID making their way through the U.S. These mutations can make coronavirus harder to contain thanks to their more transmissible nature, so experts are regularly sequencing the virus to make sure no new variants pop up and go undetected. Recently, White House COVID adviser Anthony Fauci, MD, warned that doing one thing could inadvertently create more new strains of COVID. Keep reading for Fauci's words of warning, and for more insight from the infectious disease expert, Dr. Fauci Just Gave This Scary Update on the New COVID Strain.

Delaying your second COVID vaccine shot could create more strains of the virus.

Nurse gives senior adult healthcare worker the Covid-19 vaccine

Fauci has been vocally opposed to delaying second doses of the COVID vaccine, which some experts have proposed as part of an effort to get as many first shots out as possible. Approaching vaccination this way leaves room for possibilities that weren't accounted for during the trials. As Fauci notes, one possible outcome of spacing out vaccines is the creation of more new COVID strains.

"The other theoretical issue that could be problematic with regard to only a single dose, that if you get a sub-optimum response, the way viruses respond to pressure, you could actually be inadvertently selecting for more mutants," Fauci said during a White House press briefing on Feb. 8. "So for that reason, we have continued to go by the fact that we feel the optimum approach would be to continue with getting as many people on their first dose as possible, but also making sure that people on time get their second dose." And for essential vaccine guidance, If This Happens After Your Vaccine, the FDA Says You Should Call 911.

Some experts believe worse strains could arise from spacing out vaccine doses.

Doctor preparing COVID vaccine

Delaying second doses of the vaccine might not only spawn new strains of the virus but also strains that are more problematic—that is, potentially more infectious and resistant to vaccines. According to Science News, delaying a second dose could lead to more dangerous mutations: "For the COVID-19 vaccine, if people's second doses are delayed long enough—akin to not finishing a full complement of antibiotics— it's possible that low numbers of neutralizing antibodies triggered by only one dose may only partially fight an infection. That might provide more time for variants of the virus with immune-dodging mutations to arise and thrive and be transmitted to other people." These new immune-evading strains could diminish the vaccine's efficacy. And for more up-to-date information, sign up for our daily newsletter.

While other experts believe delaying the second dose is the best way to protect people right now.

Close up of a mature man taking a vaccine in his doctors office

Although many health experts are opposed to delaying second doses of the COVID vaccine, others believe doing so is the key to preventing another surge in cases. On Jan. 31, Michael Osterholm, PhD, a member of the White House's COVID advisory board, suggested the U.S. focus on getting the maximum amount of first doses into people's arms ahead of an impending surge resulting from the new, more transmissible strains of the virus.

"I think right now in advance of this surge, we need to get as many [first vaccine] doses in as many people over 65 as we possibly can to reduce a serious illness and deaths that are going to occur over the weeks ahead," Osterholm said on Meet the Press. Focusing on administering as many initial shots as possible could minimize the number of serious illnesses and deaths stemming from the next surge, he added. And for more vaccine news, If You Have These Vaccine Side Effects, Don't Get Another Shot, CDC Says.

The CDC has given people permission to space out vaccine doses if absolutely necessary.

Closeup of doctor's hand preparing vaccination
Manit Chaidee / iStock

Although experts are still split on whether delaying the second dose is a good idea or not, as of Jan. 22, the Centers for Disease Control and Prevention (CDC) announced that extending the window between vaccines is permissible in exceptional circumstances.

In an update to its vaccine guidance, the CDC said, "The second dose should be administered as close to the recommended interval as possible." However, "if it is not feasible to adhere to the recommended interval, the second dose of Pfizer-BioNTech and Moderna COVID-19 vaccines may be scheduled for administration up to six weeks (42 days) after the first dose." This update affords states and patients flexibility to delay the second dose of the vaccine if necessary. And for more on the future of the pandemic, Dr. Fauci Says You Should Be Able to Do This One Thing by April.

Best Life is constantly monitoring the latest news as it relates to COVID-19 in order to keep you healthy, safe, and informed. Here are the answers to your most burning questions, the ways you can stay safe and healthy, the facts you need to know, the risks you should avoid, the myths you need to ignore,and the symptoms to be aware of. Click here for all of our COVID-19 coverage, and sign up for our newsletter to stay up to date.
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