 Havers was born in Stambourne, Essex, the son of Henry Havers, Rector of Stambourne.He studied medicine under Richard Morton, and later, in 1668, attended St Catharine's College, Cambridge, but failed to graduate.Following this, Havers' whereabouts are unknown until 1684, when he was admitted as an extra-licentiate of the College of Physicians of London, which allowed him to practice medicine in limited areas of the country.