<prompt> All of the following diseases can be transmitted during the incubation period exceptTuberculosisMeaslesHepatitis APertussis  <response>: Carrier: An infected person or animal that harbours a specific infectious agent in the absence of discernible clinical disease and serves as a potential source of infection to others. Incubatory carriers: Shed infectious agent during the incubation period of the disease esp. during last few days of IP.For example: Measles, Mumps, Polio, Pertussis, Influenza, Diphtheria, Hepatitis B, HIV. 