How dangerous is the Delta variant?

The Delta variant is the most contagious variant of COVID-19 to date, fueling new outbreaks in the United States and worldwide. This variant spreads twice as fast as other variants (read more about how viruses mutate here).

Unvaccinated people are especially at risk of contracting Delta.

  • According to at least two studies, patients infected with Delta had higher rates of hospitalizations than those who were infected with other COVID-19 strains.
  • Unvaccinated people are far more likely than vaccinated people to become infected with the Delta variant.
  • While breakthrough infections happen (i.e. infections in vaccinated individuals) it is far more rare than infections in unvaccinated people.
  •  According to the CDC, vaccinated people who are infected with the Delta variant appear to have a faster recovery time than those who chose to not get the vaccine.

Learn more about how the vaccines protects you against the Delta variant here

Read the CDC’s full guidance on the Delta variant here. Visit this map to see a geographic explainer of where people are most vulnerable to the Delta variant because of low vaccination rates.

Related Questions
Are children eligible to receive the Covid-19 vaccine?
The FDA and CDC have authorized Pfizer-BioNTech's vaccine for use in children ages 5 through 11 based on strong safety and effectiveness data. The vaccine's safety was studied in roughly 3,100 children who received the vaccine and no serious side effects have been noted. The Pfizer-BioNTech vaccine was also found to be 90.7% effective in preventing Covid-19 infections in this age group. The immune responses were in line with what has been shown in people ages 16 through 25. Vaccinations…
Can I mix Covid vaccines and/or booster shots?
The FDA has authorized mixing booster doses of the Pfizer-BioNTech, Moderna, and Johnson & Johnson vaccines. Following the completion of primary (two shots for Pfizer and Moderna and one shot for J&J) vaccination, eligible individuals may choose to use the same or a different available Covid-19 vaccine as their booster dose.
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The FDA has authorized booster shots for tens of millions of people who previously received two Pfizer-BioNTech or Moderna doses, including: Seniors ages 65 and older Adults ages 18+ who have underlying medical conditions that put them at increased risk of the virus Adults ages 18+ in long-term care facilities, such as nursing homes or assisted living People at increased risk of the virus due to their working or living situations -- including first responders, teachers and school…