Typhoid is a .........

The . . . . . . test confirmed the disease caused by $Salmonella$ $typhi$.

Approximately how many people suffer from typhoid fever every year?

Rahul suffers from high fever during the first and second weeks,and the fever gradually decreases during the third and fourth weeks. Which disease is he suffering from?

Pneumonia and common cold are . . . . . . diseases.

Identify the pathogen responsible for causing the disease known as $Black\, Death$.