Study leader Dr Gkikas Magiorkinis, from Oxford University, said when people were infected with something such as flu it was very easy to work out where it had come from, because people knew they were infected within days.
It was very easy for a man to become invisible in large cities like London.
He said it was very easy for the attackers to set up look-out systems using mobile phones.
It was very easy, via tabs on the desktop search, to switch between searches of documents and searches of e-mails.
Mr. GONZALO RUBALCABA (Musician): It was very easy to see all kind of traditional Cuban representation (unintelligible) activities as something normal.
Mr. CUNNINGHAM: When I think of these women, I think of royalty, and I think of strength and power, and so it was very easy.
Everybody talks about the convention speech and how good it was, but I always say, I had good material to work with. (Laughter.) It was very easy.
"At the end it was very easy to crash so I didn't want to push too much or take too many chances, it was important to be careful, " he said.
It was all very easy, he admitted.
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He believed this was because the focus when negotiating business agreements was very clear and it was easy for those involved to put aside any prejudices.
It was an easy, happy answer, but it also sounded very much like the truth.
It sounds naive but it was very ordered and structured and easy to finish in short time.
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"The shoot was easy, it was very instinctive, " Wood told the BBC.
It was a very comfortable discussion, and very easy for me to make the decision because PlayStation to me means top-quality gaming.
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From the outset it was clear that offering discount coupons within a particular geographic area was a very easy entry business.
Convincing people it was a good film to make with very little credibility to my name was not easy.
Easy Group said on Thursday that its approach was still at a very early stage and it could give no details on price.
The pope's Latin is "very easy to understand, " Chirri said, but it wasn't until the announcement was repeated that the reporter filed an urgent bulletin for ANSA, which was subsequently picked up by the rest of the world.
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The upcoming MMO Guild Wars 2 made a very good impression with me when I played it in its beta form back in May: it was both easy to play and easy to become engaged.
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