You are now leaving the StopCMVSilence website. Moderna, Inc. is not responsible for the content of external websites linked within this site. Do you want to continue?

It’s time to
talk about this
silent virus

Only 9% of women have ever heard of this highly contagious viral infection that can harm an unborn child.1 Whether you have kids or someday plan to, get informed and spread the word—because CMV is a virus all people should know about.

What is cytomegalovirus?

Cytomegalovirus, (pronounced sy-toe-MEG-a-low-vy-rus), or CMV, is a common virus that is often overlooked because healthy people who get CMV rarely show symptoms. If you are pregnant or have a weak immune system due to a health condition, CMV could have serious consequences.2,3

The #1 thing to know about CMV
Over50% of adults over the age of 40 in the United States have been infected with CMV without ever knowing it.2

CMV is common and for most people, does not pose a health risk. But for those who are pregnant or have a weak immune system due to a health condition, the virus could have serious consequences.1,2 CMV can spread silently and often affects the most vulnerable of us.

Pregnant women can unknowingly become infected during pregnancy and expose their unborn babies to CMV.3
People with weakened immune systems due to an underlying health condition are also at risk of experiencing serious symptoms of CMV.2
Women can also become infected with CMV and potentially pass it on to newborn babies through bodily fluids including saliva and breast milk.2,3
CMV is the #1 infection that causes birth defects in the U.S. yet no one is talking about it – until now.4
Learn more about CMV
Get educated

See how dedicated organizations are providing information and resources about CMV and how you can learn more.

Explore CMV resources
Helpbreak the silence around CMV

Sign up today to receive educational resources and information on Moderna CMV clinical trials.

you’re signed up

By clicking above, I agree that Moderna may use the information I’m submitting to provide me with information about cytomegalovirus (CMV) and investigational CMV prevention. I understand that all personal information I’ve submitted will be processed in accordance with Moderna’s privacy policy and I agree to the terms of use.


Doutre SM, Barrett TS, Greenlee J, White KR. Losing ground: awareness of congenital cytomegalovirus in the United States. J Early Hear Detect Interv. 2016;1(2):39-48. doi: 10.15142/T32G62.


About cytomegalovirus and congenital cmv infection. Updated August 18, 2020. Accessed December 7, 2020.


CMV fact sheet for pregnant women and parents. Updated September 2018. Accessed December 7, 2020.


van Zuylen WJ, Hamilton ST, Naing Z, Hall B, Shand A, Rawlinson WD. Congenital cytomegalovirus infection: Clinical presentation, epidemiology, diagnosis and prevention. Obstet Med. 2014;7(4):140-146. doi:10.1177/1753495X14552719