天坛生物：公司不涉及疫苗业务

Group 1 - The company does not engage in vaccine development, specifically for HIV vaccines [2] - The main business of the company is the research, production, and sales of blood products [2] - The company operates in the blood products industry, with key products including human albumin, human immunoglobulin, and human coagulation factors, as well as recombinant coagulation factor products [2]