You can protect yourself by avoiding those who cough, ask those who do to cover their cough (not with their hands, eg. with a mask
), practice good hygiene with hand
washing and don't touch your own eyes, nose and mouth.
What's important is that if in the last week you have been to Mexico, San Diego, Imperial County or Texas, and come back with a flu like illness with fever, sore throat, cough, runny nose, and possibly vomiting and diarrhea, call your doctor.