The prevalence of pneumococcal types and the continuing importance of pneumococcal infection.
D006801:Humans; D011008:Pneumococcal Infections / Q000276:immunology*; D022242:Pneumococcal Vaccines; D015995:Prevalence; D013296:Streptococcus pneumoniae
D022242:Pneumococcal Vaccines
PNEUMOCOCCAL INFECTIONS/immunology