not just 0|1)
https://scmp.com/news/china/science/article/3078840/coronavirus-low-antibody-levels-raise-questions-about…
2. People w/ IgG may still spread (not neutralizing) or get reinfected
3. Duration of Ab/protection is unknown (months/yrs?)
https://scmp.com/news/china/science/article/3078840/coronavirus-low-antibody-levels-raise-questions-about…
2. People w/ IgG may still spread (not neutralizing) or get reinfected
3. Duration of Ab/protection is unknown (months/yrs?)