There was a time, it is said, when there was no death. But the world became congested, and its resources approached the point of exhaustion. So Yama was given the role of bringing death to beings to restore nature’s balance and relieve the suffering of the planet. Death needed servants to accomplish its task.

Om Trayambkam Yajamahe Sugandhim PushtivardhanamUrvarukamiva Bandhanan Mrityor Mukshiya Maamritat ~ 
There was a time, it is said, when there was no death. But the world became congested, and its resources approached the point of exhaustion. So Yama was given the role of bringing death to beings to restore nature’s balance and relieve the suffering of the planet. Death needed servants to accomplish its task. ‪Disease, famine, accidents, and old age played this role and acted as death’s messengers. But, not understanding its place in the order of the universe, all beings feared death. They witnessed premature death and worried lest they be taken before their appropriate time. When that time did come, fear of death led to even greater suffering. To overcome this fear, it is said that Lord Shiva himself gave humanity the Maha Mrityunjaya mantra. Whenever there is stress, grief or illness, or when fear of death intrudes in awareness, this great mantra is chanted. The Great Death-Conquering mantra. Many names & forms, It is called the Rudra mantra, referring to the furious aspect of Shiva, the Tryambakam mantra, alluding to Shiva's three eyes and also known as the Mrita-Sanjivini mantra because its a life restoring mantra. Hailed by the sages as the heart of the Vedas, the maha mrityunjaya mantra awakens a healing force that reaches deep into the body and mind, lifting you up in times of trouble, restores health and happiness and brings calmness in the face of death. When courage or determination are blocked, it rises up to overcome obstacles. It's recited when taking medicines, for it prepares the body and mind to make the best use of them. And so, whenever matters of health, vitality or freedom from the fear associated with death arise, the Maha Mrityunjaya mantra naturally surfaces as a remedy and comfort! Boom Shankar!!!