Pathogenicity is a qualitative measure of whether a microorganism can cause disease, while virulence is a quantitative measure of disease severity

Pathogenicity measures how easily a disease spreads, while virulence refers to its ability to evade the immune system

Pathogenicity and virulence are interchangeable terms that both describe the ability of a microorganism to cause disease

Pathogenicity refers to the severity of a disease, while virulence determines whether an organism can cause disease