Pneumococcus can survive in organs along the human upper respiratory tract, such as the nose and throat. In fact, even healthy people can sometimes be carriers without showing any symptoms. Pneumococcus can spread through droplets while coughing and sneezing or through indirectly touching respiratory secretions. Children under the age of 5 and elderly over the age of 65 are at high risk in view of their weaker immunity and higher susceptibility to pneumococcal invasion.

Other high-risk individuals who are more susceptible to pneumococcal infections include people who have suffered from invasive pneumococcal infections in the past, people with low immunity (such as cancer patients, people infected with HIV, or those who have undergone splenectomy), patients with chronic diseases (such as diabetes or cardiovascular diseases), and people with cochlear implants.

To prevent pneumococcal infections, a safer and more effective method nowadays is be vaccinated with pneumococcal vaccines. Currently, 13-valent (for 13 serotypes) and 23-valent (for 23 serotypes) vaccines are more commonly available in the market. While 13-valent vaccines are suitable for people aged 6 months to 17 years and over 50 years old, 23-valent vaccines are suitable for high-risk individuals aged 2 or above. Although people can be vaccinated with 23-valent pneumococcal vaccine and influenza vaccine at the same time, the vaccinations need to be given in different parts of the body.

In addition to being vaccinated with preventive vaccines, it is necessary to build up good body immunity. In particular, it is important to always maintain a balanced diet, engage in moderate exercise, and have adequate rest. Make sure to pay attention to personal hygiene and keep the environment clean. Remember to cover your nose and mouth when sneezing or coughing and wash your hands frequently.