NatGeo once got into the infected zombie game. Experts talk about rabies going airborne.

There is no need for an airborne version of a lyssavirus, though this concept is obviously popular. An airborne with aggression and violence as symptoms would burn so fast that it would extinguish quickly.

Contagious pathogens have a track record of the first outbreak being the most viral, or strong, strain. This occurred with the first outbreak of the Bubonic Plague in several regions. These include Europe, the Middle East, West Asia, and the Ottoman Empire. Dogs are resistant to Plague but they died of the first outbreak strain, it was so strong. Among every species of mammals that was infected with the bacteria died in that first wave. According to journals kept at the time, pigs, cats, dogs, cows, and more died—and of course rats died. However, if the Plague remained that viral, it would have killed all the potential hosts. Only those with the rarity of natural immunity would survive. There would be no one left to infect, and thus the pathogen dies out too. Therefore, those in isolated hiding could actually wait it out.

But pathogens tend to grow weaker in the subsequent outbreak waves. This enables its own survival.

The most dangerous virus would burn fast, similar to the Plague. But it would also be carried for long periods. People would infect others without even knowing they have it, similar to HIV. This promises to become endemic. There is no waiting it out. The US government, among other governments, would go to extreme, desperate measures to stop its spread. This would lead to mass murder of potential hosts if the numbers say.

If you want to geek out hard, here is a medical microbiology journal article:

There would no choice but to throw everything at such a virus. Additionally spread by mammals and the Mokola kicker of mosquitoes, oh shit. The entire arsenal will be thrown at it. This approach means tens of millions of people will be intentionally killed. Whole ecosystems will be forced to collapse.

The initial burn is fast. The silent carrying is slow. With all the vectors, there is no way to wait out R140. And no need for it mutate into airborne.