Miao Sanduo is a pet vaccine brand, and Cat Sanlian is the name of the pet vaccine. To be precise, Miao Sanduo is Cat Sanlian. It is a vaccine that helps cats enhance their resistance and immunize against infectious viruses. It is the first choice for cat vaccines. Cats who choose Miao Sanduo need to be injected with 2-3 injections. The first 2 injections are to help the cat enhance immunity and antibody starvation, and the third injection is to strengthen the immunity.