The home is the place where influenza can spread: using the same cutlery or maybe the same plates when eating or tasting food from the cooking pot. Drinking from the same bottles.
Kissing and handshaking. Interchanging clothing. Using cloth napkins and handkerchiefs. Crowding in one room, especially in sitting rooms and the kitchen. Touching computers, remote controls, door knobs, handrails, door bells and switches.
Sharing bedrooms and beds. Dirty linen and clothing. Too little or too much ventilation. Air conditioners. Filters. Smoking from the same cigarettes.
Hugging is another way of spreading influenza.