Does vomiting invalidate fasting?

The fast of a person who is overcome by involuntary vomiting is valid and he is not obliged to make it up; he must be careful not to intentionally swallow anything of his gorge though there is no harm it does. Whoever deliberately and voluntarily vomits while remembering that he is fasting, vitiates his fast even if nothing reaches his stomach. He is to make up the fast in lieu of the day on which he has broken his fast due to the words of the Prophet who said, "Whoever is fasting and is overcome by vomiting, is not required to make up the fast but whoever throws up deliberately, is to make it up."