Man... seriously?
Unlike what Faux news may be reporting, the virus made it is way through legal ports of entry (i.e. airports) carried by all sorts of people (citizens, residents, tourists, etc).
Last time I checked, walls won't stop airplanes.
Ok, let's be serious. Let's not talk about ports of entry but points of entry. A port of entry is but one point of entry. There are many. Many are uncontrolled areas like our coastlines and northern and southern borders. Many of these areas are not practical to control or warrant control to the degree other areas are. The Southern border is an example where some areas (High Mountains) are impractical to secure with a wall but the desert plains would be.
And guess what? The virus can enter at any point of entry not just ports of entry. Other things can enter at places other then ports of entry. Building a wall would force certain entry attempts to ports of entry and secured areas.
To deny that there are people with not only this virus but other maladies coming into this country outside of ports of entry was pretty silly. Now it's not.
