Carriers are organisms or entities that transport and spread diseases or infections without necessarily showing symptoms themselves. In the context of human health, carriers can be individuals who harbor pathogens, such as bacteria or viruses, and can transmit them to others, potentially leading to outbreaks. Common examples include asymptomatic carriers of COVID-19 or Typhoid fever. In addition to humans, carriers can also refer to animals or insects that transmit diseases to humans or other animals. For instance, mosquitoes are known carriers of diseases like malaria and dengue fever. Understanding carriers is crucial for controlling the spread of infectious diseases and implementing effective public health measures.