Annika Mäyrä, MML, microbiologist
After the summer, vitamin D reserves are full and the intestinal microbiota has also diversified in outdoor games. Vitamin D stores last for about a couple of months, after which you need to top up again. When kindergartens and schools start, viruses begin to circulate among close contacts of children. Young children, from 1 to 3 years old, are the ones who get sick the most, because resistance only increases when the child encounters new bacteria and viruses. Cold weather and colds improve the ability of viruses to attack: the cycle can begin! About 5-10% of children spiral into infection, and there are typically 8-12 respiratory infections a year. This is already detrimental to the life of the child and the family.