recover_from_disease_effect

recover_from_disease_effect = {
	hidden_effect = {
		save_scope_value_as = {
			name = disease_type
			value = flag:$DISEASE$
		}

		if = {
			limit = {
				has_trait = early_great_pox
				scope:disease_type = flag:great_pox
			}
			save_scope_value_as = {
				name = disease_type
				value = flag:early_great_pox
			}
		}	
	}

	if = { #They actually have the disease you want to remove
		limit = { has_trait = $DISEASE$ }

		save_scope_as = sick_character

		#Notifications (first, because some notifications need to check health which are changed when traits are removed)
		hidden_effect = {

			#IMPORTANT CHARACTER (add to list)
			if = {
				limit = { #The disease has to be somewhat dangerous
					OR = {
						health < death_chance_dying_health
						NOR = {
							scope:disease_type = flag:ill
							scope:disease_type = flag:gout_ridden
							scope:disease_type = flag:lovers_pox
							scope:disease_type = flag:early_great_pox
						}
					}
				}
				every_parent = {
					limit = { is_playable_character = yes }
					add_to_temporary_list = disase_notification_list
				}
				every_child = {
					limit = { is_playable_character = yes }
					add_to_temporary_list = disase_notification_list
				}
				every_spouse = {
					limit = {
						is_playable_character = yes
						NOT = { is_in_list = disase_notification_list }
					}
					add_to_temporary_list = disase_notification_list
				}
				every_heir_title = {
					limit = {
						exists = holder
					}
					holder = {
						if = {
							limit = {
								player_heir ?= scope:sick_character
								NOT = { is_in_list = disase_notification_list }
							}
							add_to_temporary_list = disase_notification_list
						}
					}
				}
			}

			#PARTNERS WHO WANT TO KNOW ABOUT STDS (add to list)
			if = {
				limit = {
					OR = {
						scope:disease_type = flag:great_pox
						scope:disease_type = flag:lovers_pox
						scope:disease_type = flag:early_great_pox
					}
				}
				every_relation = {
					type = lover
					limit = {
						is_playable_character = yes
						NOT = { is_in_list = disase_notification_list }
					}
					add_to_temporary_list = disase_notification_list
				}
				every_concubine = {
					limit = {
						is_playable_character = yes
						NOT = { is_in_list = disase_notification_list }
					}
					add_to_temporary_list = disase_notification_list
				}
			}

			#IMPOTANT CHARACTER NOTIFICATION EVENT
			every_parent = {
				limit = {
					inform_about_relative_recovery_trigger = yes
				}
				add_to_temporary_list = disase_notification_list
			}
			every_spouse = {
				limit = {
					inform_about_relative_recovery_trigger = yes
					NOT = { is_in_list = disase_notification_list }
				}
				add_to_temporary_list = disase_notification_list
			}
			every_heir_title = {
				limit = {
					exists = holder
				}
				holder = {
					if = {
						limit = {
							player_heir = scope:sick_character
							inform_about_relative_recovery_trigger = yes

As written in game/common/scripted_effects/20_health_effects.txt.