It's extremely contagious but less deadly. Can you imagine if the bird flu/ebola was as contagious as covid. That is the real pandemic that is coming sometime in the future.
"The Delta variant is more transmissible than the viruses that cause MERS, SARS, Ebola, the common cold, the seasonal flu and smallpox, and it is as contagious as chickenpox"
https://www.nytimes.com/2021/07/30/health/covid-cdc-delta-masks.html