Group 1 - The company, Hualan Vaccine (301207.SZ), announced an abnormal fluctuation in its stock trading [1] - The industry in which the company operates is human vaccine manufacturing [1] - The main product of the company is the quadrivalent influenza virus vaccine, which is used to prevent influenza caused by the flu virus [1] Group 2 - Currently, the company does not have any vaccine products for the prevention of Nipah virus [1]

Group 1 - The company, Hualan Vaccine (301207.SZ), announced that its stock price has deviated by more than 30% over three consecutive trading days, indicating abnormal trading fluctuations [1] - The company operates in the human vaccine manufacturing industry, primarily producing a quadrivalent influenza virus vaccine, which is used to prevent influenza caused by the virus [1] - Currently, the company does not have any vaccine products for the prevention of Nipah virus [1]