Source: Jesus Before Christianity: The Gospel of Liberation (1976), p. 42.
Context: There can be no doubt that Jesus was a remarkably cheerful person and that his joy, like his faith and hope, was infectious. This was in fact the most characteristic and most noticeable difference between Jesus and John. As we shall see later, Jesus feasted while John fasted (Luke 7:31-34).
“Joy is more infectious than leprosy.”
Talking about the joy one gets working at his institution, Anandwan, a home for leprosy that was established by him, page=22
Baba Amte: A Vision of New India
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Baba Amte 34
Indian freedom fighter, social worker 1914–2008Related quotes

“There is more joy in giving than in receiving.”
Never doubt the truth of our Lord's promise that whatever we give him of our creativity, our resources, our persons, will come back to us in abundance.
2008, Closing Mass (19 July 2008)

“The most profound joy has more of gravity than of gaiety in it.”
Book II, Ch. 20
Attributed

“"Linux is a leprosy; …" This statement is not grammatically or factually correct.”
Rebuttal to Ken Brown http://www.cs.vu.nl/~ast/brown/rebuttal/.
The "Linux is Obsolete" Debate

“For present joys are more to flesh and blood
Than a dull prospect of a distant good.”
Pt. III, lines 364–365.
The Hind and the Panther (1687)
“Nothing in life produce a more powerful joy than a near miss by the Angel of Death.”
Source: The Heritage Universe, Convergence (1997), Chapter 26 (p. 516)