How easy are the flowers and trees in front of and behind the house to make children catch a cold and cough?

I just saw a news in the headline yesterday. A woman went to the hospital because she opened the window and wanted to feel the smell of flowers and trees in spring outside the window. The reason is that she is infected with bacteria in rotten leaves. An adult cannot resist, let alone a child.

Not to mention this, where there are many trees, there are also many bugs, so it is easy to enter the room along the window. Inadvertently biting is also a big or small thing.

There is also a well-known pollen allergy. Children's respiratory immunity is poor, so children should be exposed to allergens as little as possible.