[quote=@Silver Fox]
<Snipped quote by Burthstone>

True, so it hasn't been obvious.

He's had blood in his throat with Jarvis and Penny I believe but he's swallowed it.

Edit: Also with Mayt when he was asked to watch Melina. But again, could easily be played off as getting smashed in the head by boulders
[/quote]

And Mayt hasn't seen Edo-Karn coughing anyway.

So, when they get back to Earthland, Sasha would be the only one able to draw a connection if El-Karn keeps coughing.