David Fan

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  • Early flu exposure generates lifelong effect on immunity

    In 2016, scientists reported that exposure to influenza viruses during childhood can give people partial protection against distantly related influenza strains for the rest of their lives. The idea that past exposure to the flu virus determines a person's response to future infections, also known as "immunological imprinting,” overturned the belief that exposure to flu virus produced no immunologi...

    SciTech | February 10, 2020
  • Stressful situations cause grey hair

    Legends from around the world feature characters whose sadness turns their hair grey overnight. Bizarre as they appear to be, those stories actually include an element of truth. Researchers at Harvard University confirmed that stress can indeed lead to grey hair and discovered the reasons behind it.

    SciTech | February 3, 2020