Watch: Minnesota Health Commissioner Given Coronavirus Vaccine

MINNEAPOLIS, MN — Minnesota Department of Health Commissioner Jan Malcolm this week led by example when she received the Johnson & Johnson vaccine against the coronavirus.

Malcolm was eligible to receive the vaccine because she is among residents age 65 and older, the Minnesota Department of Health said. She received the single-dose vaccine from her health care provider.

"I’ve been in a really good mood all day," Malcolm said in a video posted to social media. "I had been wanting to get the vaccine."

The Johnson & Johnson vaccine is the only single-dose inoculation available to the public as of writing. Vaccines from both Modern and Pfizer are delivered in two doses delivered between 21 and 28 days apart.

A person's body will develop strong protection against the coronavirus a few weeks after a vaccination, the CDC estimates.

Every available vaccine against the COVID-19 virus, Malcolm said, is "very effective where it matters most, against severe illness and hospitalizations. You’re going on offense against this disease."

In a tweet, the Minnesota health department encouraged eligible residents to sign up to receive whichever vaccine is available to them first: "All three vaccines available are proven to be safe and effective at preventing severe disease, hospitalization, and death."

Minnesota health officials this week opened vaccine eligibility to over 1 million more people, including people over the age of 16 with high-risk medical conditions and several essential workers. Here's who is now eligible.

Officials say more people are expected to become available in the next four to six weeks. Department of health guidance indicates the next phase of vaccinations will include people over the age of 16 with only one chronic condition, as well as any person between the ages of 50 and 64.

In the final phase of tiered vaccination, shots will be dolled out to workers in the fields of energy, finance, construction, information technology and communications, legal, media, public safety, transportation and logistics, water and wastewater.

The final phase of vaccinations is open to the general public.