Aids patients who take effective anti-retroviral drugs do not pass on the virus even through unprotected sex, Switzerland's state commission on the disease claimed on Wednesday.
Couples were one partner is HIV-positive do not need to use a condom
to prevent transmitting the disease, as long as anti-retroviral therapy is
followed regularly and has suppressed the virus in the blood for at
least six months, the Federal Aids Commission said in a report.
The patient must also be free of any other sexually transmitted
Four different studies
The claim sparked concern against Aids charities who noted that the
scientific research is focused on heterosexual couples and vaginal
rather than anal sex.
"These findings come from four different studies," said Bernard
Hirschel, co-author of the report and an HIV/Aids specialist at
Geneva's University Hospital.
One of the research studies was carried out in Spain from 1990 to
2003 on 393 heterosexual couples where one person was HIV-positive.
The results showed that none of the HIV-negative partners was
infected by a patient taking anti-retrovirals, according to a paper
published in the Swiss Bulletin of Medicine.
Another study in Brazil found that out of 93 couples where 43 were
HIV-positive, only six people were infected and this was due to their
partners not following their treatment regime.
Two other studies, one in Uganda and one on pregnant women, arrived
at the same conclusions, Hirschel said.
Scepticism and alarm
However, other health authorities and Aids charities reacted with
scepticism and alarm to the news.
"The real thing missing (from the Swiss advice) is about anal sex
and getting a new sexually transmitted infection," said Roger Peabody
of the London-based Terrence Higgins Trust Aids charity.
"We don't feel the scientific evidence is conclusive and there are
some key issues that are not covered in this advice," he added.
But Hirschel was adamant that publishing the results of the findings
was in the best interests of the public.
"I know that these conclusions can provoke certain fears, but I
think such credible information which relies on proven and certain
facts should be made known," he said.
French Aids charity Act Up said that only a small number of HIV
patients would be affected by the findings, and that 40 percent of
anti-retroviral patients still carry the virus residually despite following
their treatment to the letter.
France's National Aids Council warned that the findings were not
robust enough to extrapolate wider conclusions from the individual
cases cited. – (Sapa-AFP)