Preventing deficiency disease and tooth decay with food the group already grows.
Keep a farming group from sickening on its own staple.
Needs first: Plant staples (Food), Preserve the harvest (Food)
Keep teeth through a starch-heavy diet, and recognise the dental infection that kills.
Needs first: Wound care and first aid, Plant staples (Food)
Every guide, build, reference sheet and book reached from the steps above.
Normal pulse, breathing, temperature and blood pressure; the signs that mean danger in a child; and how much water a body needs.
Level 3Life from the cell up: the human body, microbes and immunity, inheritance and epidemics. Each result with what it lets you do and who first found it.