When Ainsworth's convincing words fell upon all the members of the survivor group present, most of them weren't worried as they knew whether they had been bitten. Nevertheless, they were still apprehensive of everyone present as any one of them could have degenerated into a zombie and bitten them.
In Thomas's case, when he heard Ainsworth's statement, he felt the urge to believe it to be the truth.
So, he didn't doubt him; instead, he asked worriedly, "Can you please reveal them and let them leave the group? I don't want to be heartless, but the lives of everyone would be at stake if even one member were hiding that they were about to transform into a zombie."
Faced with Thomas and the other members' worries, Ainsworth patted his chest confidently and swore an oath, "Fear not! For I, Arthur, will ensure that under my leadership, no pointless lives will be sacrificed in our journey to the military-established human survival base."
