I don't follow your reasoning. Maybe we use a term differently? Here's how I understand them:
- A false positive means that a test shows someone is infected when they are not. For most tests that's somewhere between 0.1% and 2%.
- Lockdown means everyone stays at home. Different from PB's plan, where only people with a recent positive test stay home.
- R0 (technically Re) is the expected number of people each newly infected person spreads it to.
When I say a lockdown has a false positive rate of 100%, it means a lockdown is the same as if you tested everyone but the test always (100%) reported positive, so everyone had to stay home every day.
Re is a different number based on what proportion of the population is immune. Here we are talking about R0.
The point I am making is that some of the people who are on lockdown are truly positive for the virus. That’s why it works. They don’t have the opportunity to spread it outside their habitation unit.
- A false positive means that a test shows someone is infected when they are not. For most tests that's somewhere between 0.1% and 2%.
- Lockdown means everyone stays at home. Different from PB's plan, where only people with a recent positive test stay home.
- R0 (technically Re) is the expected number of people each newly infected person spreads it to.
When I say a lockdown has a false positive rate of 100%, it means a lockdown is the same as if you tested everyone but the test always (100%) reported positive, so everyone had to stay home every day.