After attending a funeral, why to take bath and why cooking is not done in those houses?

After attending a funeral both men and women stay outside the house. Then they go to the well and have a bath, wash all their clothes and then only enter the house. This is preventing any infection from the funeral house. This is more prevalent in the villages. I.e. Every person visiting the house of the dead person during the mourning period is believed to suffer from pollution. The first thing; he is expected to do on leaving the house of the dead person is to have purificatory bath. Only after this bath, they have to drink off even a glass of water or to eat and enter the main parts of his own house. The house where death was occurred is considered polluted and cooking is not done for few days. The neighbors supply them food.

-Tamilan Comes