The Big Shofar

We pray every day for the ingathering of the exiles to the sound of a big shofar, as it says in Isaiah. Why does it matter the size of Shofar?
The Shofar at Sinai was a small Shofar. Why was there a Shofar at Sinai and why small?
We hint in this lesson as to why so many people are being "punished" with injection of unnecessary experimental poisons.