Explainer-Why has wild polio been found in Germany and what does it mean?

Germany has found the wild polio virus in a sewage sample in Hamburg, the first such detection in Europe since 2010. WHAT IS ...
Tucson Weekly

What We Need to Understand About Asymptomatic Carriers if We’re Going to Beat Coronavirus

However, it does mean that if you’re standing right next to someone who is infected and they’re talking to you, or, say, if you’re in a room full of singers who are projecting their voices in an ...