Possible Clues:

• Diagnostic skin injection, and, based on the initials of their answers, what the starred clues represent
• Med. exam involving an injection into the forearm
• You might get one if you have respiratory issues
• American Lung Assn. recommendation
• Diagnostic that entails sticking the forearm with a needle
• The state of New York might make you get one after you were on a plane back from Hong Kong with this guy who couldn't stop coughing