'Endemicity' will make waves in the world more synchronous. As is the natural tendency in such oscillating systems, via phenomenae including greater transmissibility and more open borders sciencedirect.com/science/articl…
When India has another wave we will see it.
There is a natural limit to our immunity, and it is being pushed into a natural synchrony
The way to break the pattern is through vaccination at critical timepoints. Imagine rapid vaccine campaign then again at a point of waning immunity.
Otherwise higher frequency and greater amplitude
Mechanism includes positive feedback on mutagenesis from transmissibility