Immune Science

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young boy biting his fingernails

Nail-biting and thumb-sucking bring germs into the mouth — and possibly fewer allergies, too.  

patients behind mosquito bed nets

SWAT THAT VIRUS  Hospital patients recover from dengue virus infection under bed nets in Asunción, Paraguay, in 2012. The following year, the country hit a high of more than 144,500 reported cases. Vaccines may be the best means of defense against moquito-borne viruses like dengue, Zika and chikungunya.

sick child

UNEASY BREATHING  Some children have rare genetic variants that can turn their first encounter with colds and other respiratory viruses deadly.

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