Is it necessary to fight 23-valent pneumococcal polysaccharide vaccine

Pneumonia is a very common disease in infants and young children. 23-valent pneumococcal polysaccharide vaccine has the effect of preventing pneumonia. The protection time is also long. It can last for one year to one and a half years. The prevention effect is also very good. Therefore, 23-valent pneumococcal polysaccharide vaccine is necessary, especially for children with low immunity.