There are 1.3B people in India. There is no way a vaccine is going to arrive in time or be injectable at a scale that matters. If that was a solution, I'd be all for it, but it is not.
You’re missing the issue. Once hospital access is unavailable, the death rate spikes.
Young people are absolutely at risk. I can probably name a dozen <45 who required hospitalization, most briefly. Most of those folks had some impact for weeks or months.
The India variant, B.1.617, is a double mutation that seems to effect younger populations. The new explosion in cases is purported to be related to this variant and is said to be more transmissible than the South African variant.