The Red Cross Supply is an organization that provides essential supplies to those in need. The acronym COT stands for cots, which are beds used for sleeping. SERA stands for SERUM, which is a type of BLOOD product. BLOOD is a type of bodily fluid that is necessary for life. PLASMA is a component of BLOOD that helps with clotting and can be used to treat certain medical conditions. SERUM is a type of BLOOD product that is used to treat diseases and infections. PLASMAS is the plural form of PLASMA, which is a component of BLOOD.