EXCLUSIVE: Fauci on Biden's rebound COVID-19 infection, the dangers of future variants

Dr. Fauci Testifies To Senate Health Committee On Country's COVID-19 Response
WASHINGTON, DC - JULY 20: Top infectious disease expert Dr. Anthony Fauci responds to accusations by Sen. Rand Paul, R-Ky., as he testifies before the Senate Health, Education, Labor, and Pensions Committee, July 20, 2021 on Capitol Hill in Washington, DC. Cases of COVID-19 have tripled over the past three weeks, and hospitalizations and deaths are rising among unvaccinated people. Photo credit J. Scott Applewhite-Pool/Getty Images

LOS ANGELES (KNX) — As President Biden faces a rebound COVID-19 infection, Dr. Fauci says it's not unprecedented.

The president's chief medical advisor offered KNX In Depth his professional medical advice and personal experience, having battled a rebound infection himself, in a wide-ranging interview ahead of the back-to-school season and a possible winter surge.

Fauci said the number of people who have tested positive even though they're fully vaccinated has not significantly increased. However, anecdotal evidence suggests otherwise. Dr. Fauci emphasized the growing prevalence of reinfection by using himself and the President as high-profile examples. The percentages of so-called 'rebound' cases are in the single digits, but he said more studies are underway.

"There are a couple of things that we need to find out, and some studies are either being conducted already or being designed to be conducted to determine whether or not a longer durability of treatment would prevent a rebound," Fauci explained.

"At the same time," he continued, "[we have] to look at the natural history to determine if in fact the era of the B.A.5, which is now more than 80% of the cases throughout the country, whether that's a bit different than the original data was."

Fauci, who is also the director of the National Institute of Allergy and Infectious Diseases, weighed in on new vaccines to address emerging variants and why it seems their development is taking longer than it should.

Fauci said, "I think it's, 'compared to what?' If this were not mRNA it would take years."

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