The 1918 Pandemic lasted from 1918 until 1920 so the present one likely will do the same at least

So, expect to be dealing with all this on some level until 2022.

However, the problem with this one is it is becoming as common as the common cold at least genetically speaking as a virus which is pretty horrific knowing we might have to deal with a Coronavirus common cold that just keeps on killing for the next 10 to 100 years or more