Nanoparticles are particles smaller than 100 nanometers in size, usually composed of organic and inorganic materials. These materials are becoming increasingly important in the context of rapid testing because of their unique properties, such as their high surface-to-volume ratio and small size. These properties give nanoparticles a variety of functions, which can be employed to detect a variety of analytes or transport drugs and biomolecules.

In healthcare, nanoparticles have been used in a variety of applications, including diagnostics, imaging, drug delivery and tissue engineering. For example, nanomaterials have been used to improve the sensitivity and specificity of point-of-care tests such as those for HIV, cancer and other infectious diseases. Additionally, nanoparticles have been used to improve the effectiveness of drug delivery and to develop new imaging techniques to improve diagnosis. Nanoparticles can also be used to target specific tissues with drugs, making them useful for treating cancer and other diseases. Finally, nanomaterials have also been used in tissue engineering, as they can be used to control the release of drugs and biomolecules. In general, nanoparticles are an important tool in the health area, as they can be used to improve different scenarios in order to promote improvements in healthcare.