Get mosquito repellent for the house, when going out put the mossie repellent sticker on their clothing. Ensure that there’s no pool of water anywhere (pail or flower pot etc) drain out the water to prevent mosquito breeding site in the house. Cover the toilet bowl after use. See the usual advertisement on preventing mosquito breeding in the house by the government. It quite clear in there and what to do to prevent mosquito from breeding.
Voon Le Si Angeline