By Sahar Chmais

Johnson and Johnson COVID-19 vaccines are available at private medical clinics in Hays County in the first week of rollouts, beginning March 8.

The J&J vaccine is 85% effective in preventing severe disease about 28 days after vaccination, according to the company’s data. Unlike Moderna and Pfizer, the J&J vaccine will only be given in one shot, not two.

This vaccine also functions in a different manner than Moderna and Pfizer’s vaccines, which use messenger RNA t...