Biology 0610 · IGCSE · Diseases and immunity

Diseases and immunity — practice question

The table presents the number of new human immunodeficiency virus (HIV) infections per 1000 people in one country in 1990 and 2022. Which statement could account for the change in the number of new HIV infections from 1990 to 2022?

  • Aan increase in illegal drug use
  • Ban increase in reusing needles for injections
  • Can increase in screening of blood that is used for transfusions
  • Dan increase in unprotected sexual contact

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