Even if a disease is linked to travel, there is rarely any information about where those afflicted went, what they ate, how they behaved, or which vaccinations they had.
On a solo trip to Rio I stayed with him and he jokingly told me he could always spot the solo travelers by the red streaks on their backs: the spot they couldn’t reach themselves with sunscreen.
Disappointingly to some, his presentation, titled "to boldly go: My life in physics", made no mention of popular topics such as time travel or aliens that he has weighed in on in the past.