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What's the Difference Between Asymptomatic and Pre-Symptomatic Spread?

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This CCP (Chinese Communist Party) virus is bizarre for many reasons, making its spread unpredictable and hard to control. One oddity is how easily people…
This CCP (Chinese Communist Party) virus is bizarre for many reasons, making its spread unpredictable and hard to control.
One oddity is how easily people can get infected by someone without symptoms. But there’s a difference between asymptomatic spread and pre-symptomatic spread.
Asymptomatic spread is the transmission of the virus by people who do not have symptoms and will never get symptoms from their infection. But those infected carriers could still get others very sick.
Pre-symptomatic spread is the transmission of the virus by people who don’t look or feel sick, but will eventually get symptoms later.
You can’t. Both types of carriers look and feel normal, though the pre-symptomatic carriers will get symptoms later.
Studies suggest pre-symptomatic spread is more common than asymptomatic spread.
“Detailed contact tracing from Taiwan as well as the first European transmission chain in Germany suggested that true asymptomatics rarely transmit,” said Babak Javid, a principal investigator at Tsinghua University School of Medicine in Beijing and an infectious disease consultant at Cambridge University Hospitals.
“However, those (and many other) studies have found that paucisymptomatic transmission can occur, and in particular, in the German study, they found that transmission often appeared to occur before or on the day symptoms first appeared.

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