"We found a significantly lower risk of hospitalisation with omicron infection compared with delta infection among both vaccinated and unvaccinated individuals, suggesting an inherent reduced severity of omicron," the researchers wrote.
The Omicron variant spreads more easily than earlier variants of the virus that cause COVID-19, including the Delta variant. CDC expects that anyone with Omicron infection, regardless of vaccination status or whether or not they have symptoms, can spread the virus to others.
Omicron infection generally causes less severe disease than infection with prior variants. Preliminary data suggest that Omicron may cause more mild disease, although some people may still have severe disease, need hospitalization, and could die from the infection with this variant.
A report from South Africa's largest health insurer found that a sore throat, congestion, dry cough and lower back pain ranked among the most common early omicron symptoms.
While some have suggested that most people will eventually get the coronavirus, you should do your best to avoid infection with Omicron—there is no justification for deliberately getting infected so you have what you think will be a mild illness that will provide you with more immunity going forward, the doctors say.
Experts say that nothing is certain regarding Omicron and long COVID, mainly because the variant roared onto the scene so suddenly in December that too little time has passed to detect a strong Omicron signal in the ongoing stream of long COVID cases.
Both coronavirus variants had common symptoms such as runny nose, headache and sneezing, but debilitating symptoms such as brain fog, dizziness and fever were less prevalent in Omicron cases.
Delta variant symptoms are the same The symptoms of the Delta variant appear to be the same as the original version of COVID-19. However, physicians are seeing people getting sicker quicker, especially for younger people.
Body aches or muscle pains may be an early symptom of COVID-19, often appearing at the very start of the illness and lasting for an average of 2-3 days. Unfortunately, COVID-19 body aches can sometimes last much longer and are commonly reported in people with long COVID-19 or post COVID-19 syndrome.
“It has become apparent that omicron generally leads to milder symptoms for the most part,” Dr. Bahmanpour says. “And symptoms usually last 5 to 10 days, which is shorter than previous variants, which could last up to 14 days.”
The Omicron COVID-19 variant can cause croup in young children, including severe cases that require hospitalization and intensive care, a new study shows.
In adult populations, the protection conferred by two vaccine doses against Covid-19 wanes (more against milder infection than against severe disease) and is lower for omicron than for delta. However, a booster dose increases protection, including protection against omicron.
Side effects post first vaccine dose of normal injection site pain, fatigue and headache were more common in participants aged ≤49 years versus >49 years, while pain at the vaccination site, fatigue, lethargy, headache and tenderness were the most common side effects post second dose in both groups.
People infected with the Delta variant have roughly 1,000 times more copies of the virus in their respiratory tract than those infected with the original strain of COVID-19. Those who are fully vaccinated are much less likely than those who are unvaccinated to contract and spread the Delta variant, but it does happen.
It's estimated that Delta caused more than twice as many infections as previous variants—in Connecticut, it was estimated to have been 80 to 90% more transmissible than the Alpha variant.
A recent study conducted by investigators from Brazil, the United Kingdom and the University of Copenhagen has found that the COVID-19 variant P. 1, which originated in Brazil, is more transmissible than the original virus and is able to evade immunity. Results from the study were published in the journal Science.
If you've been experiencing muscle and joint pain following a bout with COVID-19 and it's not getting better with time, it's probably time to see your doctor. “In cases like this, your primary care provider will usually refer you to a physical therapist,” Kristine said.
Early research suggested that it could take 2 weeks for your body to get over a mild illness, or up to 6 weeks for severe or critical cases. Newer data show that recovery varies for different people, depending on things like your age and overall health.
Fatigue usually lasts for 2-3 weeks after COVID-19 infection, although some people may experience fatigue for 12 weeks or more after the infection is gone.
What are the symptoms of the Delta variant? The symptoms are similar to those seen with the original coronavirus strain and other variants, including a persistent cough, headache, fever, and sore throat.
Having two doses of a COVID-19 vaccine remains the most effective way of ensuring protection against the Delta variant first identified in India, preliminary research has found.
The CDC's list of COVID-19 symptoms includes fatigue, muscle or body aches, headache, sore throat, congestion or runny nose, nausea or vomiting, and diarrhea. Asymptomatic infections are also common.
Loss of sense of smell or taste, once a signature symptom of COVID-19, doesn't necessarily apply to the Omicron variant. A new study by the U.K. Health Security Agency, in fact, found loss of smell or taste in only about 13 percent of cases tracked by the nation's National Health Service.
Erythema pernio, known as chilblains, have been frequently reported in younger individuals with mild COVID-19 to the extent that they have earned the moniker “COVID toes.” However, the reason behind their development is not yet apparent.
The most commonly reported side effects were pain at the injection site, tiredness, headache, muscle pain, chills, joint pain, nausea and vomiting, swollen lymph nodes in the same arm of the injection and fever. Side effects typically started within two days of vaccination and resolved two or three days later.