Sentence:  Having hedged its bets in this way , PHS apparently decided it would be possible to make some sort of determination after all : `` At present radiation levels , and even at somewhat higher levels , the additional risk <WSD>is</WSD> slight and very few people will be affected '' . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)