Even with the Delta variant, the ability of COVID-19 vaccines to prevent hospitalization hasn't significantly dropped, CDC scientist says

COVID-19 vaccines are still highly effective against hospitalization despite the surge in the more transmissible Delta variant, a scientist with the Centers for Disease Control said on Monday.

In a presentation to the CDC'S Advisory Committee on Immunization Practices on Monday, Dr. Sara Oliver said that since Delta appeared, vaccine effectiveness against hospitalization ranged from 75% to 95%.

The vaccine's ability to prevent infection ranged from 39% to 84% since the introduction of the Delta variant.

"Vaccines remain effective in preventing hospitalization and severe disease but might be less effective in preventing infection or milder symptomatic illness," the presentation said.

The slides said both waning protection over time and the Delta variant may be contributing to the lower effectiveness of the vaccines.

Oliver said it's not uncommon for some vaccines to require multiple doses, including vaccines for hepatitis and HPV. However, she said more information is needed before the group can assess the need for booster shots. ...