Example 1 to paragraph 39.31(b)(2). A passenger has a common cold. This condition is readily transmissible by casual contact but does not have serious health consequences. You may not take any of the actions listed in paragraph (a) of this section.
Example 2 to paragraph 39.31(b)(2): A passenger has HIV/AIDS. This condition is not readily transmissible by casual contact but does have serious health consequences. You may not take any of the actions listed in paragraph (a) of this section.
Example 3 to paragraph 39.31(b)(2): A passenger has SARS or a norovirus. These conditions are readily transmissible by casual contact and have serious health consequences. You may take an action listed in paragraph (a) of this section.
Example 4 to paragraph 39.31(b)(2). A passenger has a condition that is not readily transmissible by casual contact to or does not have serious health consequences for the general passenger population. However, it is possible that it could be readily transmitted by casual contact with and have serious health consequences for an individual with a severe allergy or severely compromised immune system. You may not take any of the actions listed in paragraph (a) of this section.
49 C.F.R. §39.31