No, you’re not crazy. Yes, the CDC’s mask guidelines are confusing — should you wear a mask indoors even if you’re vaccinated?

Wear a mask. Don’t wear a mask. Make one. Buy one. Wear it outdoors. Wear it indoors.

Confused? You’re not alone.

So what’s the deal with the CDC’s new guidance? In an effort to help combat the highly contagious delta variant, the U.S. Centers for Disease Control and Prevention said Tuesday that people in areas with “substantial” or “high” rates of COVID-19 should go back to wearing masks in public indoor spaces.

“The delta variant is showing us every day its willingness to outsmart us,” Dr. Rochelle Walensky, director of the CDC, told reporters. “The delta variant behaves uniquely, different from past strains of the virus that cause COVID-19.”

In an interview scheduled to air Wednesday afternoon, Walensky told SiriusXM’s “Doctor Radio Reports” show that vaccinated people who are “breakthroughs” and have become infected by the virus have the same amount of virus as the unvaccinated people. “That is very much leading us to believe that it is probably the case that those vaccinated breakthrough infections, rare as they might be, have the potential to infect others,” she said.