The U.S. Centers for Disease Control and Prevention stealthily edited a webpage it maintains that lists details about messenger RNA (mRNA) COVID-19 vaccines.
"Our cells break down mRNA from these vaccines and get rid of it within a few days after vaccination," it says. "Scientists estimate that the spike protein, like other proteins our bodies create, may stay in the body up to a few weeks."
A CDC spokesperson acknowledged to The Epoch Times that the removal happened, despite the page still saying it has not been updated since July 15.
The removal drew criticism from some, including scientist Ray Armat, who first noticed the stealth edit.
In a social media post, he described the alteration as done "in a tacit/underhanded way."
The ClaimsMessenger RNA is the technology utilized by both the Pfizer and Moderna COVID-19 vaccines, the most administered vaccines in the United States and a number of other countries.
The vaccines deliver the mRNA into muscle cells, where the mRNA triggers the production of the spike protein. The spike protein is a component of the virus that causes COVID-19. The spike protein remains on the cell's surface, which trains the immune system to produce antibodies against the virus.
After that process is finished, the cells break down the mRNA and it leaves the body as waste, according to the CDC.
The agency makes several challenged claims about mRNA vaccines, including alleging the mRNA does not affect or interact with a person's DNA.
Pfizer has maintained that its vaccine "does not alter the DNA sequence of a human cell" and the CDC spokesperson said the alteration to the webpage "was not a change to the science of how the mRNA vaccines work."
"The mRNA from these vaccines are broken down by the cells that interpret this coding, and the process takes a few days after vaccination," the spokesperson said.