A vaccine made from inactivated pathogens is called a _____________________

A vaccine made from inactivated pathogens is referred to as a killed-virus vaccine. This type of vaccine utilizes viruses or bacteria that have been killed or inactivated so they cannot cause disease. However, they still contain the antigens that stimulate the immune system to recognize and respond to the pathogen without the risk of causing illness.

Live-virus vaccines, in contrast, use weakened forms of the pathogen, maintaining their ability to replicate and induce a strong immune response but with reduced virulence. Recombinant vaccines are created by inserting genes from a pathogen into another organism, which then produces antigens. Protein subunit vaccines consist only of pieces of the pathogen (like proteins), which can effectively prompt an immune response without using the live or killed pathogen itself.

The killed-virus vaccine is particularly important because it allows for the development of immunity without the risk associated with live pathogens, providing a safer alternative for vaccination.