Nice to hear from Watsi after all this time! Here's the original Show HN Chase linked to:

Show HN - We just built a site that saves lives - https://news.ycombinator.com/item?id=4424081 - Aug 2012 (183 comments)

... followed by the other threads I could find (in forward order for a change):

Meet Watsi, Y Combinator's First Nonprofit - https://news.ycombinator.com/item?id=5117385 - Jan 2013 (168 comments)

The Story of Bageshwori, Watsi's First Patient - https://news.ycombinator.com/item?id=5299910 - Feb 2013 (63 comments)

Watsi (YC W13) and the Future of Patronage - https://news.ycombinator.com/item?id=5445014 - March 2013 (11 comments)

Catching up with Watsi: Y Combinator’s first non-profit graduate - https://news.ycombinator.com/item?id=5508064 - April 2013 (20 comments)

PG chooses healthcare non-profit Watsi as his first board seat - https://news.ycombinator.com/item?id=5579353 - April 2013 (31 comments)

Watsi (YC W13) raises $1.2M first-of-its-kind 'philanthropic seed round' - https://news.ycombinator.com/item?id=6103506 - July 2013 (94 comments)

Watsi Lands $1.5M Donation From Humble Bundle - https://news.ycombinator.com/item?id=6916609 - Dec 2013 (20 comments)

A dose of perspective - https://news.ycombinator.com/item?id=7549245 - April 2014 (38 comments)

Stories from our first two years - https://news.ycombinator.com/item?id=8286476 - Sept 2014 (34 comments)

Universal Fund - https://news.ycombinator.com/item?id=8563558 - Nov 2014 (29 comments)

Saying Yes - https://news.ycombinator.com/item?id=9428403 - April 2015 (13 comments)

Watsi launches universal health coverage, funded by YC Research - https://news.ycombinator.com/item?id=15165111 - Sept 2017 (281 comments)

How we built Watsi Coverage without stable electricity, WiFi, or email - https://news.ycombinator.com/item?id=16398220 - Feb 2018 (25 comments)