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Imperial College London said its candidate rhinovirus vaccine APL-10456 produced encouraging preliminary Phase I results. A single dose was well tolerated and elicited immune responses against the three major rhinovirus groups. The randomized, placebo-controlled Phase I enrolled 144 healthy volunteers; the first stage tested three single-dose levels in 18–54-year-olds, assessing safety, tolerability and immunogenicity. A second stage is evaluating a two-dose regimen in adults 55 and older, with additional data expected in Q4.