Carbon monoxide poisoning occurs through excessive inhalation of this chemical compound which is very harmful to health and can even be fatal. The symptoms of this intoxication are headache, nausea, weakness, tinnitus, vomiting, loss of consciousness, arrhythmia cardia, among others. The family exposed in the question has some of these symptoms, which allows us to conclude that this family is probably carbon monoxide poisoned.
The principal focus during this stage should be the prevention of further neurologic damage. This is necessary because, when nerves are damaged, full muscle strength and functions are usually not fully recovered due to the fact that nerve fibers do not normally grow rapidly.