The virus was first discovered and isolated in March, 1992.

The viruses have only been isolated from mammals to date.

The virus had been isolated, but it died too quickly to be studied seriously.

The new virus was isolated from a Cameroon man and his wife.

This virus was isolated from cows that appeared to be healthy.

The virus, as I say, was isolated ten years ago.

Two additional viruses have been isolated but have yet to be named.

The virus was first isolated in Australia around 1970.

The virus itself was first isolated in 1972 using suckling mice.

The largest virus yet discovered has been isolated from the ocean off the coast of Chile.