illustration of green viral particles flowing into a person's nostril
First COVID-19 Human Challenge Trial Reveals Uneven Susceptibility
Only half of volunteers deliberately exposed to SARS-CoV-2 developed an infection. None developed serious symptoms, paving the way for further challenge trials.
First COVID-19 Human Challenge Trial Reveals Uneven Susceptibility
First COVID-19 Human Challenge Trial Reveals Uneven Susceptibility

Only half of volunteers deliberately exposed to SARS-CoV-2 developed an infection. None developed serious symptoms, paving the way for further challenge trials.

Only half of volunteers deliberately exposed to SARS-CoV-2 developed an infection. None developed serious symptoms, paving the way for further challenge trials.

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challenge trials
An illustration of several human heads wearing masks
Q&A: Human Challenge Studies of COVID-19 Underway in UK
Jef Akst | Jun 18, 2021
Researchers at Imperial College London and the University of Oxford are exposing healthy volunteers to SARS-CoV-2 for science.
A Challenge Trial for COVID-19 Would Not Be the First of Its Kind
Jef Akst | Oct 8, 2020
Although scientists debate the ethics of deliberately infecting volunteers with SARS-CoV-2, plenty of consenting participants have been exposed to all sorts of pathogens in prior trials.