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Hello, this is Dr. David. I am reviewing your question now and will be with you momentarily.
yes, there can be flu and viral infections in cancun
are you coughing up sputum? what color is it?
do you have a thermometer to check for fever?
how old are you?
how long have you been sick?
green and yellow sputum can be a sign of a bacterial lung infection, like bronchitis or pneumonia
you should see a doctor
and get a sputum culture
and chest xray and temp check
you may need a course of antibiotics to get better.