Guess what, large scale decreases in human population due to pandemic will lower carbon footprints.
2% mortality from the coronavirus would not be a large scale decrease, even if the entire world population was infected. You would need something like the bubonic plague worldwide. (A 30% reduction.)
Nuclear war would do it! But it has adverse environmental effects.
You could reduce the carbon footprint by 2% just with things like LED lights or an incremental improvement to automobiles. There is no need to knock off 156 million people.
The population is still growing, so 2% would soon be replaced. Note, however, that the population under age 30 is hardly growing. Nearly all present growth is from third world adults living to a full natural lifespan of ~80 years. In another 40 years they will all reach that age, and growth will stop.