A330
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Physiological - Other
Aircraft Equipment Problem Less Severe; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor; Flight Deck / Cabin / Aircraft Event Illness / Injury
Flight Crew Overcame Equipment Problem; General Physical Injury / Incapacitation; General Maintenance Action
Aircraft
After gate arrival at ZZZ; the #1 Flight Attendant asked to come to the cockpit to discuss a problem in the cabin. He explained that during the initial climb out from ZZZ1; all the flight attendants smelled a musty; moldy; stinky sock smell. He never informed us of this issue until we were talking at the gate in ZZZ. Flight Attendant went on to explain that soon after I signaled the flight attendants that we were passing through 10;000 ft. and I made my 'Flight attendants; prepare for landing' PA; the musty; moldy; stinky sock smell returned but; stronger this time. He said passengers were closing their air vents; and covering their noses with articles of their clothing etc. He said he didn't call me due to the sterile cockpit rule. All the flight attendants agreed that the smell lasted until reaching the gate. After confirming the same story with every flight attendant; I called Maintenance; entered it into the AML; and filled out the fumes report for Maintenance. The airport sent [paramedics] to the gate area and every crew member was checked. The main common factor seemed to be high blood pressure. The top number was over 200 for four of the flight attendants and the [paramedics] transported that four to a local hospital for additional tests and observation. I made sure each flight attendant had a buddy or someone that would stay with them. My symptoms were headaches and my blood pressure slightly higher than normal; extremely tired following the event.
[Report narrative contained no additional information.]
A330 flight crew reported they were notified post flight by a Flight Attendant of a stinky sock" smell during climbout.  Several flight attendants and the Captain experienced health issues."