Narrative:

Pushed back out of mdpp; around 150 [passengers]. After engine start; flight attendant called us to inform us a passenger was vomiting in the lavatory. We waited a few minutes; as we were behind traffic anyway and couldn't taxi. The captain and I discussed returning to the gate; and decided if the passenger was still in the lav in 5 minutes; or if when they came out they were not feeling well; we'd return to the gate. After 2 minutes; the flight attendant called and reported she was out and feeling better. We asked 'are you sure?' the flight attendant said yes. We taxied; took off; and flew for an hour and 20 minutes without incident. At this time; they called to report our meals were ready. I asked about the ill passenger; and the flight attendant told me there were 20-25 sick people in the back. Vomiting; diarrhea; etc. At this point; we knew we had an issue. We asked them for as much info as possible; if the people knew each other; stayed at the same resort; etc. It was then we learned people boarded the aircraft complaining of illness. This is the first time we heard any of this. I'm truly not trying to throw anyone under the bus; but it was frustrating to find out these details so late in the flight; where we are an hour from the nearest airport with few options. At this point; we requested direct [to destination] and tried to get a patch to medlink. We were on the boundary of HF and VHF; so we never got a clear signal on the VHF frequency they gave us. The fas came back that 3-4 passengers felt really sick; and the other 20 or so either felt off or had been sick in puerto plata. One had even been in the emergency room the night before in the dominican republic. Again; news to us. Most or all of the sick passengers stayed at the same resort. We got direct; were cleared visual [approach]; and parked offsite so the cdc could evaluate whether there was a bigger issue. After 40 minutes; they had evaluated the sickest passengers and determined we could go to the gate.

Related reports:

Google
 

Original NASA ASRS Text

Title: Air carrier flight crew reported unknowingly departing MDPP with 20-25 ill passengers.

Narrative: Pushed back out of MDPP; around 150 [passengers]. After engine start; FA called us to inform us a passenger was vomiting in the lavatory. We waited a few minutes; as we were behind traffic anyway and couldn't taxi. The Captain and I discussed returning to the gate; and decided if the passenger was still in the lav in 5 minutes; or if when they came out they were not feeling well; we'd return to the gate. After 2 minutes; the FA called and reported she was out and feeling better. We asked 'are you sure?' The FA said yes. We taxied; took off; and flew for an hour and 20 minutes without incident. At this time; they called to report our meals were ready. I asked about the ill passenger; and the FA told me there were 20-25 sick people in the back. Vomiting; diarrhea; etc. At this point; we knew we had an issue. We asked them for as much info as possible; if the people knew each other; stayed at the same resort; etc. It was then we learned people boarded the aircraft complaining of illness. This is the first time we heard any of this. I'm truly not trying to throw anyone under the bus; but it was frustrating to find out these details so late in the flight; where we are an hour from the nearest airport with few options. At this point; we requested direct [to destination] and tried to get a patch to MEDLINK. We were on the boundary of HF and VHF; so we never got a clear signal on the VHF frequency they gave us. The FAs came back that 3-4 passengers felt really sick; and the other 20 or so either felt off or had been sick in Puerto Plata. One had even been in the emergency room the night before in the Dominican Republic. Again; news to us. Most or all of the sick passengers stayed at the same resort. We got direct; were cleared visual [approach]; and parked offsite so the CDC could evaluate whether there was a bigger issue. After 40 minutes; they had evaluated the sickest passengers and determined we could go to the gate.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.