Well, it's a complex subject. As far as I'm aware, not a single person has died as a direct result of inhaling or ingesting plutonium, and in fact there are probably thousands of people happily walking around with much more than an atom of Plutonium in their bodies.
You wouldn't want to be around a biggish chunk of it however, that would almost certainly mean curtains from radiation poisoning.
Exactly what Russia is now saying. The thing would almost certainly have burned up on re-entry, and the chance of it landing on land was minimal. A demonstration of the USA's ability to shoot down spy satellites more likely.