He suspects it was an altogether different virus the second time round (but that's also unproveable).

After the long voyage, the customs officers rummaged the ship.

In the prison of the 'tween decks reigned a darkness pregnant with murmurs. The sentry at the entrance to the hatchway was supposed to prevent the prisoners from making a noise, but he put a very liberal interpretation upon the clause, and so long as the prisoners refrained from shouting, yelling, and fighting--eccentricities in which they sometimes indulged--he did not disturb them.

In contrast to what might be expected, MHC class I-deficient mice are not autodestructive.