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The CDC has issued updated guidance for people with underlying medical conditions who are considering getting the coronavirus vaccine.

"Adults of any age with certain underlying medical conditions are at increased risk for severe illness from the virus that causes COVID-19," the CDC said in the guidance posted on Saturday. "mRNA COVID-19 vaccines may be administered to people with underlying medical conditions provided they have not had a severe allergic reaction to any of the ingredients in the vaccine." Both the Pfizer and Moderna vaccines use mRNA, or messenger RNA.

The CDC guidance had specific information for people with HIV, weakened immune systems, and autoimmune conditions such as Guillain-Barre syndrome and Bell's palsy who are thinking of getting the vaccine.

People with HIV and weakened immune systems "may receive a COVID-19 vaccine. However, they should be aware of the limited safety data," the CDC said.

Head over to Medscape to read the full story.