Pneumococcal infection, caused by Streptococcus pneumoniae, is a common cause of pneumonia in people of all ages. All infants are offered the pneumococcal vaccination as part of the national childhood immunisation programme. Older children and adults who are at increased risk of pneumococcal infection, and all adults over the age of 65 years old, are also offered a pneumococcal vaccination.

Pneumonia can develop suddenly within 24 hours or may sometimes come on more slowly, over several days. Complications of pneumonia are more common in older adults, however it can affect any age and can be more serious for infants and young children.

The information outlined above reflect current NHS Choices recommendations

Pneumonia is of greater risk to patients who have other health conditions, such as a lung condition or a weakened immune system. Patients who smoke also put themselves at a greater risk of pneumonia.

The immune system of those with HIV/AIDS is weakened and patients suffering from chronic problems with their heart, liver or kidneys have an increased risk of pneumonia. Pneumonia is also a major complication of influenza.

To check whether a patient may be at greater risk of developing pneumonia click here.