By opting in to SMS messages you agree to receive mobile updates and promotional messages from the CDC Foundation. Message frequency varies. Text HELP to IMPACT (467228) for help. Text STOP to IMPACT (467228) to end. Msg&Data Rates May Apply. By opting in, I authorize CDC Foundation to deliver promotional messages using an automatic telephone dialing system, and I understand that I am not required to opt in as a condition of purchasing any property, goods or services. By leaving this box unchecked you will not be opted in to SMS messages at this time.