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That paragraph is referring to a previous incident. The current incident occurred in France in behalf of a Portuguese firm.

The last two paragraphs are in reference to a separate trial. More info on that trial: https: //en.m.wikipedia.org/wiki/TGN1412

Don't feel bad, the article was a little unclear. I had to backtrack to figure out that the penultimate paragraph signaled a change in topic.

That's referring to a previous drug trial.