Changestothebacteriathatliveinsideallofusareresponsibleforincreasingthenumberofpeoplewithallergies,suggestsnewresearch.
InthisepisodeofHorizon,theshowinvestigatesthisclaimbyconductingauniqueexperimentwithtwoallergicfamiliesinordertofindoutjustwhatitisinthemodernworldthatistoblame.Witharaftofminicameras,GPSunitsan..bbb
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