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This chapter has been revised to include the updated recommendations on the schedule for immunising individuals with asplenia, splenic dysfunction or severe immunocompromise and advice regarding the removal of the recommendation for an additional Hib vaccine for children and adults with asplenia or splenic dysfunction.
Some medical conditions increase the risk of complications from infectious diseases, and children and adults with such conditions should be immunised as a matter of priority. These groups may also require additional vaccinations or additional doses of vaccines to provide adequate protection.