However, there is a process of acclimatisation, which the allergic person has to go through in order to reduce the severity of the cat allergy. (petsmagazine.com.sg)
There was no apparent acclimatisation in Cairo or Shanghai, says Kalkstein, where this is not an option for most people. (newscientist.com)
Our excellent acclimatisation programme ensures the very best possible preparation for this world famous trek. (aito.com)