flu

As nouns the difference between flu and sick

is that flu is influenza while sick is sick people in general as a group.

As an adjective sick is

in poor health.

As a verb sick is

to vomit or sick can be (rare).

As nouns the difference between clue and flu

is that clue is a strand of yarn etc as used to guide one through a labyrinth; something which points the way, a guide while flu is influenza.

As a verb clue

is to provide with a clue.

As a noun flu

is influenza.

As an initialism rsv is

revised standard version (a version of the bible translated into english).

As a noun flu

is influenza.

As nouns the difference between pandemic and flu

is that pandemic is a pandemic disease; a disease that hits a wide geographical area and affects a large proportion of the population while flu is influenza.

As an adjective pandemic

is widespread; general.

As nouns the difference between flu and sickness

is that flu is influenza while sickness is the quality or state of being sick or diseased; illness; disease or malady.

As nouns the difference between adenovirus and flu

is that adenovirus is any virus of the family , many of which are responsible for respiratory infections in humans while flu is influenza.

As nouns the difference between hangover and flu

is that hangover is illness caused by a previous bout of alcohol drinking while flu is influenza.

As nouns the difference between strep and flu

is that strep is (pathology) while flu is influenza.

As nouns the difference between flu and corona

is that flu is influenza while corona is a crown or garland bestowed among the Romans as a reward for distinguished services.