H90 is a designation used in various contexts, but it is most commonly associated with a specific type of Hepatitis C virus treatment. This treatment involves a combination of antiviral medications aimed at eradicating the virus from the body. H90 is part of ongoing research to improve the effectiveness and accessibility of HCV therapies. In another context, H90 can refer to a model of helicopter or other machinery, indicating a specific design or version. These models are often used in industries such as aviation and manufacturing, where precise specifications are crucial for performance and safety.