Somewhere along the line, H3N2 and H1N1 viruses were present in a mammal at the same time, and the "matrix-gene" (or m-gene) from the H1N1 pandemic virus was picked up by the H3N2 swine flu, creating a new or variant version of H3N2.

CNN: CDC: Cases of new swine flu strain rising

Somewhere along the line, H3N2 and H1N1 viruses were present in a mammal at the same time and the "matrix-gene" (or m-gene) from the H1N1 pandemic virus was picked up by the H3N2 swine flu, thus creating a new or variant version of H3N2.

CNN: CDC: Increase seen in new swine flu strain

"We know of a large enterprise customer who has the original version, and they have this variant as well, " he said.

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There are no release dates for either version, but speculation says the PC version could be out in a few months, while a console variant would likely come some time later.

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Several factors have combined to today's decision to buy a short take-off and vertical landing version of the plane (the F-35B) rather than the more capable F-35C variant that would have required catapults to hurl it skywards.

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