[BostonCard]

You are looking for the ID50 (the dose of viral particles that will cause 50% of people to become infected). It’s not known for COVID-19.  For SARS, in mice, the ID50 was several hundred.  A turkey coronavirus looks to require 10^4.88 particles for transmission.

https://pubmed.ncbi.nlm.nih.gov/30146717/

There’s not much data, but it probably requires breathing in hundreds to thousands of viral particles.  Unfortunately, someone who is infected can shed millions of viral particles.

BC

[BostonCard]

You are looking for the ID50 (the dose of viral particles that will cause 50% of people to become infected). It’s not known for COVID-19.  For SARS, in mice, the ID50 was several hundred.  A turkey coronavirus looks to require 10^4.88 particles for transmission.

https://pubmed.ncbi.nlm.nih.gov/30146717/

There’s not much data, but it probably requires breathing in hundreds to thousands of viral particles.  Unfortunately, someone who is infected can shed millions of viral particles.

BC