A virus is a microscopic infectious agent that can cause disease in humans and animals. The crossword solutions for the term 'virus' include 'VENOM' (5 letters), which is a poisonous substance produced by some animals; 'MICROBE' (7 letters), which is a very small organism, such as a bacterium or virus; 'INFECTION' (9 letters), which is the invasion of the body by disease-causing organisms; 'CONTAGION' (9 letters), which is the spread of a disease from one person to another; 'POISON' (6 letters), which is a substance that can cause injury, illness, or death; 'GERM' (4 letters), which is a microorganism that causes disease; 'BUG' (3 letters), which is an insect or other small creature; 'ebola' (5 letters), which is a deadly virus that causes fever, bleeding, and organ failure; and 'SCAN' (4 letters), which is the process of examining something closely.