Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 185.73; Flight Crew Total 11322.08; Flight Crew Type 1053.82
Physiological - Other
Flight Deck / Cabin / Aircraft Event Illness / Injury
Environment - Non Weather Related; Human Factors
Just prior to departure; purser advised me the passenger in seat X5 [was] coughing; unmasked; not sure if he was unable or unwilling to wear a mask; and had just thrown up on himself.  I made the decision that the person was not suitable for a [long] flight and was to be removed.  The two passengers traveling with him had elected to stay behind and the GSC (Ground Security Coordinator) coordinated the removal of the three passengers.
Air carrier Captain reported that an ill passenger boarded and was not wearing a face mask. Captain decided to have passenger removed from flight due to length of the flight and passenger's condition.