The COVID-19 vaccines mean one big step closer to being able to put the pandemic behind us. And while the Centers for Disease Control and Prevention (CDC) has come a long way in understanding this virus, there are still some unknowns. Take a look:

Fact: COVID-19 vaccines are effective at preventing COVID-19, especially severe illness and death.

It’s unknown how effective the vaccines are against variants of the virus. The CDC indicates that early data show the vaccines may work against some variants but could be less effective against others.

Fact: Preventative measures, such as wearing a mask, social distancing and regularly washing hands, help stop the spread of COVID-19. These measures are still important, even as the number of people being vaccinated increases.

It’s unknown how how long COVID-19 vaccines can protect people.

Fact: People are considered fully vaccinated two weeks after your second dose of the two-dose vaccines (such as Pfizer or Moderna) or two weeks after you receive a single-dose vaccine.

If you’re interested in receiving the COVID-19 vaccine, here’s a resource to find registration information in your state:

• Maryland
• New Jersey
• Ohio
• Pennsylvania
• West Virginia

Remember, even people who’ve had their vaccines — should continue following all the health and safety protocols to help protect themselves and others.