Prevention

The best way to protect against PD is through vaccination. Vaccines are generally safe and effective. Two types of vaccines currently available are- a pneumococcal polysaccharide vaccine (PPSV) used for adults and a pneumococcal conjugate vaccine (PCV) used for infants and children under 2 years of age and children under 5 years who have a weakened immune system.

你可以征询医生意见，看你儿子要打PPSV还是PCV。

Pneumococcal vaccines. (Minimum age: 6 weeks for pneumococcal conjugate
vaccine [PCV]; 2 years for pneumococcal polysaccharide vaccine [PPSV])

Administer 1 dose of PCV to all healthy children aged 24 through 59 months who are
not completely vaccinated for their age.

For children who have received an age-appropriate series of 7-valent PCV (PCV7), a
single supplemental dose of 13-valent PCV (PCV13) is recommended for:
——All children aged 14 through 59 months
——Children aged 60 through 71 months with underlying medical conditions.

Administer PPSV at least 8 weeks after last dose of PCV to children aged 2 years or
older with certain underlying medical conditions, including a cochlear implant. See
MMWR 2010:59(No. RR-11), available at http://www.cdc.gov/mmwr/pdf/rr/rr5911.pdf.