Questions are still being raising about whether US boxer Tommy
Morrision has HIV+ or not.

<http://www.nytimes.com/2007/07/22/sports/othersports/22boxing.html?pagewanted=1&
_r=1&ref=sports>:

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Tommy Morrison had a seemingly boundless future in 1996. A former
heavyweight boxing champion, he had had a starring role in 'Rocky V'
and was in line for his biggest payday, a showdown against Mike Tyson.
All that came to an abrupt end, though, when he tested positive for
H.I.V., the virus that causes AIDS.

These days, he is back in the ring. He fought in West Virginia in
February, and his return has raised questions of just how a fighter
whose blood tested positive for H.I.V. in 1996 could test clean today.

This year, Morrison took two separate blood tests to support his
assertion that he was not infected with H.I.V., West Virginia
officials said last week. The test results provide new details on why
they licensed him to return to the ring 11 years after he tested
positive.

Two nationally renowned H.I.V. experts reviewed those and a third
blood test for The New York Times, and said they suggested Morrison
had been knocked out of the ring by false positive tests — if, indeed,
the new tests are his blood.

However, five prominent ringside physicians remained skeptical of the
assertion because Morrison tested positive for H.I.V. a number of
times in Nevada in 1996. The virus is not curable. Morrison had not
publicly challenged the 1996 findings until last year.

The doctors all said the only way to resolve the issue was with new
testing.

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This does sound as if the doctors are saying 'Let's keep testing until
we get the result we want.'

Only two 'HIV antibody' tests are required to condem someone to a
lifetme of hostpital visits, deadly drug treatment and eventually
death from AIDS.  But these doctors suggest an endless number of 'HIV
tests' are needed to prove someone is not 'HIV+.'