Finnish researchers added greenery and soil to daycare outdoor play areas.

Findings

• Children got an immune boost and more diverse microbiota in the skin and gut.
• The change supported the immune system and may prevent autoimmune conditions such as asthma, eczema, and type 1 diabetes

Citation:

Daycares in Finland Built A ‘Forest Floor’ and it Changed Children’s Immune Systems. 2020. Science Alert (scientific article linked) https://www.sciencealert.com/daycares-in-finland-built-a-backyard-forest-and-it-changed-children-s-immune-systems