The emergency crews were staged in front of Terminal A and at the gate when the plane landed just before 7:30 p.m.
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Passengers on the Delta flight from Minneapolis told ABC7 News the people who were sick were told to stay onboard while everyone else was allowed to deplane.
Those passengers described a rough flight.
One man said it was like being on a boat- the plane was in a constant up-and-down rocking motion.
He described a young woman, who'd disappeared to the lavatory for an hour, ultimately kneeling in the aisle. He said he handed her an air sick bag.
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The San Jose Fire Department said two people suffered motion sickness and vomited.
Another 5 passengers became ill in reaction to the first two.
No one was taken to the hospital.