The plural form of virus is viruses. It is not "viri".
The singular of virus is "virus." Unlike most words, virus does not change form when it is singular or plural.
The plural for virus is viruses. Simply add an -es at the end of the word.
Viruses
Most people use "viruses", but if you wanted to be really proper about it, you could treat it as the original Latin word and use "virii" (pronounced like "vye-rye", both syllables rhyme with "eye").
The plural of organ is organs.
The singular of virus is "virus." Unlike most words, virus does not change form when it is singular or plural.
"Virii" is an incorrect pluralization of the word "virus." The correct plural form of "virus" is "viruses." Viruses are infectious agents that replicate inside living cells and can cause diseases in humans, animals, plants, and even microorganisms.
The plural for virus is viruses. Simply add an -es at the end of the word.
The word virus is a noun. The plural form is viruses.
The plural form of the word "virus" is spelled "viruses."
Viruses
Most people use "viruses", but if you wanted to be really proper about it, you could treat it as the original Latin word and use "virii" (pronounced like "vye-rye", both syllables rhyme with "eye").
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."
The plural form of "was" is "were."