Why was Edvard Munch often taught at home as a child?

Edvard Munch was often taught at home during his childhood because he suffered from poor health, which frequently prevented him from attending school.1

His early life was deeply affected by a series of tragedies, as his family was plagued by illness and death. His mother and his eldest sister both died of tuberculosis when Munch was young, and he also lost his father and brother during his youth. Reflecting on these formative years, Munch famously remarked that "illness, insanity, and death" were the "black angels" that kept watch over his cradle and accompanied him throughout his life.21