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Il virus Zika, se infetta una donna incinta, può causare la microcefalia del feto. Il legame tra la malattia e la malformazione è stata stabilita per la prima volta dai ricercatori dei Centri per il controllo e la prevenzione delle malattie statunitensi.
Le autorità avevano forti sospetti sull'esistenza di questo legame, e hanno agito di conseguenza, ma mancava ancora la certezza. La malattia si è diffusa in Sudamerica e ha colpito con particolare forza il Brasile, dove si contano oltre 1,5 milioni di casi.
La conferma dovrebbe fornire un nuovo impulso alla ricerca di vaccini contro il virus e allo studio di nuovi metodi per combattere le zanzare responsabili della sua diffusione.
AFP/REUETRS/sf
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