There are several types of medical purifiers that are designed to remove or reduce various types of contaminants from the air. Here are some of the most common types:

HEPA filters: HEPA (High-Efficiency Particulate Air) filters are designed to remove particles from the air, including pollen, dust, and other allergens. They can also remove viruses and bacteria, although they may not be effective against all types.

Carbon filters: Carbon filters are designed to remove odors and gases from the air, such as smoke, cooking fumes, and VOCs (volatile organic compounds).

UV-C purifiers: UV-C purifiers use ultraviolet light to kill bacteria and viruses in the air. They can be effective against some types of airborne pathogens, but may not be effective against all types.

Ionic purifiers: Ionic purifiers use charged particles to remove particles and contaminants from the air. They can be effective against some types of allergens and particles but may produce ozone as a byproduct, which can be harmful in high concentrations.

Ozone generators: Ozone generators are designed to produce ozone, which can react with and remove contaminants from the air. However, ozone can be harmful to human health in high concentrations and should be used with caution.

Electrostatic purifiers: Electrostatic purifiers use an electric charge to attract and trap particles and contaminants from the air. They can be effective against some types of allergens and particles.

Medical purifiers may use one or more of these types of filters or purifiers to remove contaminants from the air. It is important to choose a purifier that is designed to address the specific type of contaminant that is of concern. Additionally, it is important to follow the manufacturer's instructions for the maintenance and replacement of filters to ensure the purifier remains effective over time.