Why we can't count on an antibody test to prove someone is not infected with Covid-19 (unless it is a very, very good antibody test).

Using apps for contact tracing has inherent flaws, and may not even be a workable solution.

Redesigning public toilets to eliminate the danger of leaving germs on surfaces.

The article advocates installing "sensor taps" to turn the faucet on and off. This is a fine idea, if the details are done right. However, I find most sensor-controlled faucets hard to use. I can't determine exactly where the sensor is looking, so I have trouble turning the water on and off. The sinks don't bother to show where the sensor points: they expect it to be obvious, and it isn't.

Washing hands is not the only thing people do with sinks. For instance, I used to brush my teeth in a certain sink. When it was refitted with a sensor-controlled faucet, that became almost impossible.

Whereas the US has let 30 million workers become unemployed, European countries have subsidized workers' payrolls.

The US should break up the four large meat-packing companies to protect the nation's food supply.

Plutocratist government has allowed many industries to become too concentrated. My tax proposal would pressure the large companies to split themselves up without the need for a lawsuit against each one.