The COVID XBB.1.5 subvariant is spreading. Here's what we know.

There is a new variant of dread.

There has been an increase in the United States of late and the World Health Organization is concerned. The subvariant makes up most of the rising hospitalizations in the Northeast U.S.

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Are you worried about the latest subvariant? Why are some people calling it something else? Right now, here is what to know.

What’s the difference with subvariant XBB.1.5?

Maria Van Kerkhove, technical lead for the WHO, told CNBC that officials are concerned about how quickly XBB. 1.5 is spreading in the Northeast. She said in a press conference that it was the most transmissible subvariant that had been detected.

The number of XBB. 1.5 cases rose from 1% of all cases at the beginning of December to 41% by the end of the year.

What are the symptoms?

The symptoms seem to be similar to those of previous versions of the Omicron variant, which means more cold-like symptoms. It's basically descended from last year's Omicron, which explains why the loss of taste or smell aren't occurring as frequently here.

According to USA TODAY, the symptoms can range from a lack of breath to a lack of oxygen.

How do keep from catching this subvariant?

Keeping up to date with your vaccine and boosters is the best way to prevent diseases.

It is possible to reduce the risk of infections by wearing a well-fitting mask.

Can I catch COVID again after having it once?

After catching it, you will have some protection, but that doesn't mean you won't get it again. According to the Centers for Disease Control and Prevention, there can be re-infections.

What do I do if I test positive?

If you test positive for COVID, medical officials say you should be isolated for at least 5 days if you experience symptoms, and not end your isolation until 24 hours after your symptoms abate. If you don't experience symptoms, you should be isolated for 5 days and wear a mask for 10 days, so that you don't get sick from the virus.

If you have symptoms, it's a good idea to reach out to a medical professional.

Why "Kraken" though?

The "Kraken" subvariant has been called XBB. 1.5 by some in theTwitterverse. According to Fortune, the name came from a biology professor in Canada.

Gregory wanted to give this subvariant a name that was more powerful than XBB. 1.5 or Omicron and chose the name of a sea monster from norse mythology. He has other mythical creatures.

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It has taken off on social media.