![]() This is why we ask people who may have been involved in risky behaviour to refrain from donating for a specific period after high risk exposure. Although a person’s test result would be negative during this time, the virus is present in the blood and can be passed on to a patient through a blood transfusion. ![]() When a person is infected with HIV or other viruses, the virus remains undetectable for some time in the blood. The “window period” is the time from when someone becomes infected to the time our tests are able to detect such an infection. Our screening test ensures that your blood pressure and haemoglobin levels are within a safe range for you to donate.Įvery infectious disease has a window period.
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