At the same time, the 1918 influenza virus outbreak was occurring in humans.

But because these two viruses were in different hosts, they evolved differently, so they both have a common ancestor, going back to 1918.

But because that swine H one N.

One was in pigs, it evolved differently from human H one n.

One.

And now that swine H one N one is basically a new virus to humans and pre existing immunity.

We have two seasonal each one and one doesn't really protect the significant from it.

Whales and seals both carry particular strains of influenza.

Horses carry influence of our strains on dhe.

Recently, dogs have become a significant source of influenza virus infection.

News lends a virus particle is roughly round in shape.

It has a couple of protrusions coming off of it in two different shapes, one that's more of a spike and one I'm more of a propeller shaped in the H spike is used to enter a cell, and the other the end spike that we always refer to is used to actually get away from myself anywhere.

From 9 to 12 hours later, the surface of that cell starts to form little bubbles, and those bubbles are new virus particles coming off for about 3 to 4 hours.

That cell will be able to make infectious virus particles, and it can make anywhere from 10,000 to nearly a 1,000,000 virus particles, depending on the cell type.

So if you're immune to infection with influenza, that means that you had antibodies that will bind to the virus particle and keep that virus particle from interacting with the self.