Newly released text messages from Dr. Anthony Fauci have prompted questions regarding his handling of evolving COVID-19 evidence during the pandemic, according to Dr. Marc Siegel, a Fox News senior medical analyst.

Siegel suggested in a recent interview that the former White House chief medical adviser was at times too "dogmatic" and slow to adapt as scientific understanding of the virus and vaccines changed. The texts are part of an initial batch of communications from Fauci's government-issued cellphone, released by Sens. Ron Johnson, R-Wis., and Rand Paul, R-Ky., shedding light on private discussions among top health officials.

"The other issue is flexibility," Siegel told Fox News Digital. "I have a feeling about Dr. Fauci that he's too dogmatic... he would stick to some idea he has and follow it through regardless of contradictory or changing evidence."

Siegel stated that Fauci, while a respected immunologist and vaccinologist, may have ventured beyond his areas of expertise on issues such as lockdowns, school closures, and masking. This, Siegel posited, could explain perceived shifts in guidance.

COVID-19 Vaccination in Pregnancy

Among the topics addressed in the newly released messages is COVID-19 vaccination during pregnancy. Siegel, a proponent of vaccines including mRNA technology, noted that pregnancy presented complex risk calculations early in the pandemic. He acknowledged that recommending vaccination at that time was reasonable based on initial knowledge.

However, as the virus mutated and vaccine effectiveness waned, Siegel believes the public discussion should have evolved more rapidly. "As the vaccine changed and the virus mutated, and as the vaccine became less protective, that needed to be entered into the public debate about the vaccine — and Dr. Fauci wasn't fast enough to do that," Siegel said. He also pointed to a study that raised questions about a potential link between a second vaccine dose and early miscarriage, suggesting that conflicting evidence may not have received sufficient consideration.

While acknowledging that current data favors vaccination throughout pregnancy, Siegel questioned the promptness with which contradictory information was addressed.

Evolving Mandates and Public Trust

Siegel also argued that policies, such as vaccine mandates, were not adjusted quickly enough in response to changing evidence about vaccine effectiveness. "I think the problem was that the mandates continued," he said. "We were too slow to pivot on this vaccine, and that led to a lot of public distrust."

He observed a noticeable difference between Fauci's private communications and public statements, stating, "There's a difference between public and private discourse here. There should be none."

Siegel expressed concern about whether Fauci's guidance evolved with emerging information or solidified into dogma. "I'm looking at one thing: Where was the evolution of guidance and thought and staying within your lane as more and more information came out? Or did this develop more and more into dogma and megalomania? I don't know. That's what I'm disturbed about."

He cautioned that judgments about pandemic-era communications should consider the context of what scientists knew at the time, acknowledging the uncertainty and the learning process involved. "Humility is the best way to go — not dogma," Siegel concluded.