Which one of the following statements is incorrect regarding typhoid fever?
1
Typhoid fever is caused by the highly contagious Salmonella Typhi.
2
Typhoid spread through contaminated food or water.
3
According to WHO children under the age of two years account for a large proportion of severe typhoid fever cases.
4
Since 2000, multi-drug-resistant (MDR) S Typhi has increased steadily in India.