abt hiv windows period

[shadow2013]

dear，

i m a volunteer, In order to help net friends escape  HIV fear，I do hope someone who can say something abt hiv windows period, such as in China, some expert say that 6 weeks (42 days)negative  test results  will be definitive,then no need to scare any more, but maybe Doc. in the USA maybe say it needs 8 week(56days), and UK doc may say 4weeks or what else,

So my question is  in your studies, doctors or exporters say that how many weeks or days for people to escape from hiv scare in your Country?

thank so much for all your answers in advance,

[latchu_ek]

An additional HIV test should be offered to all persons at 3 months (12 weeks) to definitively exclude HIV infection. Patients at lower risk may opt to wait until 3 months to avoid the need for HIV testing twice.

BASHH

[Jeremiahjohnson]

It's three months dude it says in the CDC manual as teak has showed you. Very rarely six if your on chemo, anti rejection drugs for an organ transplant, or a heavy iv drug abuser. They say absolutely nobody turns positive after six for any reason with modern antibody tests. Hope that helps.

[shadow2013]

i see you answered alot, but actually i think 3 monthes is overly conservative,

have you ever heard or do you have any evidence to me somebody who get a negative after 6week or 8weeks, but he/she get a positive result after 3monthes ?

you can clink bellow that WHO statement abt  windows period , http://www.who.int/diagnostics_laboratory/faq/window_period/en/#

some usa expert say that 4 weeks 90% are safe if negative, and 8weeks definately safe if negative,

[Teak]

http://www.cdc.gov/globalaids/Resources/pmtct-care/docs/TM/Module_6TM.pdf
Page 11
#4
  In an adult, a positive HIV antibody test result means that the person is infected, a person with a negative or inconclusive result may be in the “window for 4 to 6 weeks but occasionally up to 3 months after HIV exposure. Persons at high risk who initially test negative should be retested 3 months after exposure to confirm results

UK Fourth Generation  Testing
http://www.bhiva.org/documents/Guidelines/Testing/GlinesHIVTest08.pdf
Post testing
Page 11
The need for a repeat HIV test if still within the window period after a specific exposure should be discussed. Although fourth generation tests shorten the time from exposure to seroconversion a repeat test at three months is still recommended to definitively exclude HIV infection.