HIV test strips are generally tested using blood. There are many manufacturers of test strips for HIV testing and the technology is mature enough to have a high degree of accuracy under regular operation. The test strips accomplish the initial screening for HIV by detecting antibodies specific to the virus, and the sample taken can be blood. Different test strips require different samples to be taken, but saliva measurement is not permitted and oral mucosal exudate can be collected. Although HIV test strips are highly accurate, but there are also factors such as improper human operation, test strip quality problems, moisture and other external factors, there may be false positives or false negatives, it is recommended to choose a formal channel to buy. If you suspect that you are infected with HIV, please go to a regular hospital in a timely manner, under the guidance of a doctor to standardize the diagnosis and treatment, in order to avoid adverse consequences.