An infectious disease is a clinically evident disease resulting from the presence of pathogenic microbial agents, including pathogenic viruses, pathogenic bacteria, fungi, protozoa, multicellular parasites, and aberrant proteins known as prions. These pathogens are able to cause disease in animals and/or plants.

Infectious pathologies are usually qualified as contagious diseases (also called communicable diseases) due to their potentiality of transmission from one person or species to another. Transmission of an infectious disease may occur through one or more of diverse pathways including physical contact with infected individuals. These infecting agents may also be transmitted through liquids, food, body fluids, contaminated objects, airborne inhalation, or through vector-borne spread.

Dawnrays Pharmaceutical (Holdings) Ltd. is a Hong Kong-based pharmaceutical enterprise, engaged in the development, manufacturing and marketing of cephalosporin antibiotics, and various specialty drugs (generic drugs). The product range also covers various pharmaceutical formulations, including bulk drugs, powder for injection, tablets, capsules, granules and intermediates, such as Anti-infective Drugs, Cardiovascular System Drugs, and etc.