HTML <mark> element
Human diseases caused by virus include <mark>AIDS</mark>,
<mark>influenza</mark>, <mark>hepatitis B</mark> etc.
Human diseases caused by virus include AIDS, influenza, hepatitis B etc.
Human diseases caused by virus include <mark>AIDS</mark>,
<mark>influenza</mark>, <mark>hepatitis B</mark> etc.
Human diseases caused by virus include AIDS, influenza, hepatitis B etc.