Can salivary glands infected with COVID-19 increase risk for relapse or reinfection?

University of Utah Health scientists are leading an effort to determine if salivary glands infected with the virus that causes COVID-19 could diminish a person's long-term immunity to the disease after being immunized or after recovering from the illness.

source https://medicalxpress.com/news/2021-10-salivary-glands-infected-covid-relapse.html