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The dizzying speed of omicron's spread has left Americans questioning much of what they know about Covid-xix.

Though much remains uncertain, experts are starting time to sympathise more about the variant and how it affects people who are vaccinated, unvaccinated or who have had a Covid infection. For instance, people who are exposed to omicron announced to become sick faster and may have symptoms that are different than those of other variants.

What are the symptoms of omicron?

Early evidence suggests that for most people, at least those who are up to date on their Covid vaccines, omicron appears to cause milder illness that tin can resemble the mutual cold, another form of the coronavirus.

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Dr. Katherine Poehling, an infectious disease specialist and vaccinologist at Atrium Health Wake Forest Baptist in N Carolina, said that these appear to be the prominent symptoms from omicron:

• Cough
• Fatigue or tiredness
• Congestion and runny nose
• Sore throat
• Headache

"Nosotros're seeing a lot of sore throat, runny nose, fatigue and balmy headache," said Dr. Rahul Sharma, the emergency physician-in-chief at the NewYork-Presbyterian/Weill Cornell Medical Center.

Dissimilar in previous variants, the loss of taste and smell seems to be uncommon, doctors say.

But Poehling, who is also a fellow member of the Advisory Commission on Immunization Practices, which helps guide the Centers for Disease Control and Prevention's decisions on vaccines, and others stress that those symptoms are based on early reports of omicron cases, not scientific studies.

"Anecdotal reports represent but ane person," said Dr. Bruce Y. Lee, a professor of health policy and direction at the City Academy of New York Schoolhouse of Public Health. "We accept to accept them with a grain of common salt."

What'southward more, they may just reflect sure segments of the population: immature and otherwise healthy, equally well as those who are fully vaccinated.

"It is articulate that if you're vaccinated, peculiarly if you've had a booster, omicron tends to produce milder infections," said Dr. William Schaffner, an infectious disease expert at the Vanderbilt University Medical Heart in Nashville, Tennessee.

"What we haven't seen yet is a substantial trunk of information about what omicron will do in unvaccinated people," he added.

Indeed, at least one person who was not vaccinated is reported to have died of omicron. Officials in Houston appear in December that the unvaccinated homo in his 50s succumbed to the virus.

For people who have been vaccinated, just have not had a booster, typical symptoms include more coughing, more fever and more fatigue than those who have received an extra dose, said Dr. Craig Spencer, managing director of global health in emergency medicine at New York-Presbyterian/Columbia Academy Medical Center.

Does omicron cause less severe illness?

There is also emerging evidence that omicron tends not to burrow deep into the lungs equally much every bit previous variants. A report, which was posted online by the University of Hong Kong and not yet peer-reviewed, found that while omicron is less severe in the lungs, it can replicate faster college up in the respiratory tract.

In this mode, omicron may act more similar bronchitis than pneumonia, said Dr. Hugh Cassiere, director of critical care services for Sandra Atlas Bass Heart Infirmary at the North Shore University Hospital, on Long Island, New York.

"Ordinarily patients with acute bronchitis tend not to exist short of breath. They tend to coughing and produce sputum," he said. "Patients with pneumonia tend to be brusk of jiff and experience more drawn than bronchitis in general."

A small study from the CDC found that people who had Covid and are subsequently reinfected with omicron may experience fewer symptoms than they did during their initial tour with the virus.

Still, it's almost impossible for people to rely on symptoms to self-diagnose an illness. In addition to omicron, the delta variant continues to circulate, forth with increasing cases of the flu.

For these reasons, doctors urge people who have any cold symptoms or flulike symptoms to get tested.

How apace do omicron symptoms kickoff?

Co-ordinate to early information, the time it takes for an infected person to develop symptoms after an exposure may be shorter for omicron than for previous variants — from a total calendar week downwardly to as little equally three days or less.

While much more research is needed, it makes scientific sense that a highly contagious virus like the omicron variant would have a shorter incubation period. Its goal, after all, is to infect as many people equally possible, as speedily as possible.

"That'south why the spread is occurring at a much faster pace," said Dr. Anita Gupta, an anesthesiologist and critical intendance physician at the Johns Hopkins School of Medicine. She added that information technology'south possible the incubation menstruation could be shorter or longer depending on a number of variables, including historic period, underlying health problems and vaccination condition. "There is no hard and fast dominion here."

How long do symptoms terminal?

Symptoms appear to concluding three to five days for well-nigh patients, said Sharma.

"A lot of these patients are non having the symptoms for the ten to 12 days that I saw when in that location were no vaccinations," he said. He noted that, in general, symptoms appear to be shorter and milder in the vaccinated compared to the unvaccinated.

For the vaccinated, emergency room or hospital stays are also typically shorter.

"What I tin tell you is that patients that are unvaccinated are definitely our sicker patients," Sharma said. "Those are the patients that are more likely to become to the ICU. Those are the patients that are more probable to exist admitted to the hospital."

Dr. Ryan Maves, an infectious diseases and critical care physician at the Wake Woods School of Medicine in North Carolina, agreed, maxim the overwhelming majority of Covid patients he sees in the ICU are unvaccinated.

When should I get tested for Covid?

Given the potential for a shorter incubation period, Vanderbilt's Schaffner brash that anyone who has been in contact with an infected individual go tested about 72 hours post-obit the exposure.

"If you've been exposed and at present you're asking yourself, 'When should I get tested?' I call back you would best wait at to the lowest degree three days to see if you've turned positive," he said.

For the millions of people without whatever known Covid exposure, but who are getting together with friends and family, Schaffner said, information technology would be prudent to go a rapid test the twenty-four hours of the gathering.

Dr. Anthony Fauci, chief medical adviser to President Joe Biden, agreed.

"By all means, go the extra stride, get the extra mile to become tested" to convalesce any concerns about gatherings, he said on NBC's "TODAY" prove last month.

Could omicron lead to long Covid?

Though much remains unknown about omicron, experts say the variant could pb to long Covid, fifty-fifty with a balmy case.

Patients with long-term symptoms tin feel crushing fatigue, irregular heart rhythms and other problems months later on their initial Covid infection. This occurred during the outset wave of the pandemic, and has continued to lead to long Covid problems through the delta wave.

"Nosotros should presume that this variant can do the same thing that previous variants take until proven otherwise," Lee, of CUNY, said.

Previous research, nevertheless, suggests that vaccination can greatly reduce the risk for long Covid.

How worried should I be most omicron?

The omicron variant accounts for almost 95 percent of U.South. samples and the delta variant makes upwardly the rest, according to contempo CDC projections.

Since omicron has striking about every expanse of the U.South., "the question is, how much disease will information technology cause?" said Dr. Michael Saag, an infectious disease expert and associate dean for global health at the Academy of Alabama at Birmingham.

Experts continue to urge people to get vaccinated and get a booster shot to reduce the risk of severe disease.

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Source: https://www.nbcnews.com/health/health-news/omicron-symptoms-covid-what-to-know-rcna9469

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