Breaking: CDC Says There Will Be A Major Change to Vaccine Guidance

The CDC says vaccine guidance will change as a result of increased risk of heart inflammation as well as increased risk of myocarditis.

The amount of time needs to increase between vaccine doses, U.S. health officials have confirmed to Fox News.

The risk of heart inflammation is lowered if the vaccines are given eight weeks apart. Americans previously received the second dose in a shorter timespan.

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These changes impact the Moderna and Pfizer vaccines.

Some people do not respond well to vaccines, particularly if they are immunocompromised.

Those who are immunocompromised are advised by the CDC to get four vaccine jabs.

The CDC has yet to make a decision on the revised vaccine timeline.

More from Fox News:

CDC guidance suggests this group should receive three vaccine doses within two months and a fourth dose around five months after the third. The CDC is now suggesting that immunocompromised people should get their fourth short as soon as three months after the third.

Dr. Sara Oliver, a CDC official, said during Friday’s presentation, that an extended interval appears to reduce the risk of myocarditis. She also said the risk of heart inflammation is lowered if the vaccines are given eight weeks apart.

Although rare, myocarditis is a side effect seen in the Pfizer and Moderna shots and appears to be most common with young men. Most cases are mild and resolve quickly.

Some 33 million people in the U.S., between the ages of 12 and 39, remain unvaccinated, according to Oliver.