Last summer, Dr. William Thompson, a senior epidemiologist at the Centers for Disease Control, admitted that he had helped the CDC hide data from a study which linked the MMR vaccine to autism. Holistic doctor David Brownstein tells Newsmax Health the CDC is still not owning up to Dr. Thompson's charges that they found data that links the vaccine to a spike in autism. "The CDC is still not coming clean," Dr. Brownstein says. "They want to keep it quiet, but it's time the cover-up ended."

Some experts believe that the measles, mumps, and rubella vaccine (MMR) caused an increase in autism, but the idea has been roundly discredited by government officials.

Officially, the 2004 CDC study Dr. Thompson helped conduct found no link between the MMR vaccine and autism. In addition, the study, which was published in the journal Pediatrics, stated that no particular racial group was more at risk than others.

But Dr. Thompson said the actual data painted quite a different picture. He confessed that he and other CDC scientists intentionally omitted African-American children from the study, and changed data in order to show no link between vaccines and autism.

In fact, the original data found that giving a child the vaccine before the age of 36 months increased the risk of autism by 69 percent, and giving it to an African-American child increased the risk of autism by 240 percent!

Since Dr. Thompson's admission, nothing has been done, says Dr. Brownstein, author of the newsletter Natural Way to Health. "It's been almost a year and nothing has happened. Zip. Zero. No testimony. No hearing. No nothing."

Earlier this year, the Obama administration gave Thompson whistleblower status, granting him immunity. Hearings have been promised, but none have taken place. Dr. Brownstein urges Congressman Jason Chaffetz to move forward with plans to hold hearings on the CDC cover-up, and to issue a subpoena to Dr. Thompson. "The CDC will not let him speak out without a subpoena," he says.

As for Thompson, although he believes in the importance of vaccines, he regrets going along with omitting crucial information that showed a link between the vaccine and autism. "I regret that my coauthors and I omitted statistically significant information in our 2004 article published in the journal Pediatrics," he said in a statement. "The omitted data suggested that African-American males who received the MMR vaccine before age 36 months were at increased risk for autism. Decisions were made regarding which findings to report after the data were collected, and I believe that the final study protocol was not followed."

"It's time to clean up the CDC cesspool," says Dr. Brownstein. "Dr. Thompson must speak, under oath. We all need to email the Congressional Oversight and Reform Office today and request that Dr. Thompson be issued a subpoena.

"If the CDC intentionally hid the data that the MMR vaccine was associated with autism, then CDC heads need to roll," says Dr. Brownstein. "This needs to end ... now!"