The main problem cited in winter homes when it comes to passing on germs is the lack of ventilation and warm moist air (because of indoor washing and drying). This is an ideal environment for bugs and germs to flourish. Household members are also more likely to be bringing germs into domestic spaces during the winter months on their hands or breathed in within enclosed unventilated spaces.
To combat this, try to open windows as much as possible. More ventilation can help to freshen stale air and lessen the likelihood of coming into contact with the tiny drops of mucus that are sneezed or coughed into the air when people are ill.
And, while it's tempting to make the most of the energy used for heating the house, drying clothes on a radiator can cause unwanted moisture in the air. Using a dehumidifier can offset the moisture particles thought to increase the spread of germs in the air, but it's worth thinking about alternative ways to dry clothes.
Remember, central heating and closed windows also create dream conditions for dust mites, bacteria and mould. Dust mites love warm environments but can't stand the cold. However, we can keep mites at bay with a few simple measures.