Repeated patterns show callers framing themselves as a CDC‑linked survey, often routed through a research firm like NORC at the University of Chicago. The script is short, the tone scripted, and the calls drop when you engage—classic hallmark of a high‑volume research outreach that’s become a nuisance. If you keep getting them, let the call go to voicemail, then block the number or add it to your carrier’s spam filter. Consider registering your line with the national Do‑Not‑Call registry and report persistent callers to your phone provider. Blocking and reporting are your best tools to curb these unwanted surveys.
The callers consistently use an unusual tone and leave voicemails with someone yelling when I fail to answer
That unknown number was ignored since we dont answer unrecognised numbers
This number consistently calls and hangs up, and when attempting to return the call, they hang up again, creating a frustrating cycle.
This number continously calls me - I've blocked the number and left a mesage, but the calls persist.
I recieved a voicemail on 12/29/2016 at 1:36pm, a woman was saying 'this is shit' and then the call was dropped, thats weird
Hang-ups occurred on consecutive days from this number
They called and then just hung up on me 😒
I keep recieving calls from this number, first few times i didnt pick up and they didnt leave a message, but today i pickd up and they said it was a survey for the CDC, so i blocked the number
Every night around 7:45pm, this number keeps contacting me, saying they are doing a survey for the CDC
repeated hang-ups occur, occasionally accompanied by background noise suggestive of a large call center, indicating potential scams
The caller hung up as soon as I answered their 7:20 call
Tonight and last nite, I got a call from this number, didnt anser...obviously a scam cal
Fraud alert
at 12:30 Atlantic Time, the call was terminated without any conversation
This number just call and hang up, no message
Recieving calls dailly between 5:30 and 8 pm is really annoying, they dont leave a message when you dont anser.
At 12:44 on 11/08/2016 and again on 11/10/2016, I received calls from this number, but no message was left, proving to be extremely irritating
Four calls recived from unknown number in three weeks time
Despite answering, the caller remained silent, prompting me to block the number due to suspicion of another pointless survey
The call ended abruptly after connection
Unsolicited calls from this number are frequent and unwelcome.
Frequent calls with no messages, and the origin of their interest in my number is unknown, making this very frustrating.
Within a span of three days, this number has called me twice, despite having no connection to anyone in Chicago, and no messages were left.
Sunday night at 8:00 PM, I got an unsolicited call from this number, which was unwelcome and annoying.
The identity of this caller remains unknown, and I urgently need to determine who it is.
A message was left claiming to be from the Center for Disease Control, providing a callback number of 877-220-4805.
A nighttime call from this number was unusual and prompted a quick hang-up.
I got a call on my cell phone, even though I'm on the DO NOT CALL LIST, and they didnt leave a voic message.
Upon receiving a call, it was pointed out that the timing was inappropriate, being Sunday night at 8:30, and a strong request was made not to call again.
The government is fully aware of the doses manufactured and sold, so they have no need for any information from you.
