As soon as the weather is cold, the old people at home get sick. What should I do?

It is normal for the elderly to get sick easily when they are old, with weakened resistance and low immunity. First of all, they should change their clothes in time as the weather changes. Second, they need heating at home to prevent the elderly from freezing. Third, you can't eat cold food. More importantly, the elderly should supplement nutrition, calcium and protein, such as egg protein powder, to supplement nutrition for cells and supply energy for various organs. When the viscera of the elderly are nourished, they are less likely to get sick. You try!