6 yếu tố nguy hại có thể gây ung thư
Tia cực tím, các bức xạ ion hóa, thực phẩm ướp muối hoặc mốc, tác nhân truyền nhiễm từ vi khuẩn, virus... là yếu tố nguy hại có thể gây bệnh ung thư.
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