An ethnic bioweapon is a type of weapon that is used to harm people based on their race or ethnic background. It uses different kinds of bacteria or viruses to target people from certain ethnic or racial groups. The bacteria or virus might cause diseases in only those groups of people, or it might make people sicker than others who are not from that group. These kinds of weapons can be used to spread illnesses or diseases in a targeted way, and can cause a lot of damage to a certain group of people.