Hailey Tran
Omicron has caused a surge in hospitalisations, with more COVID-19 patients than any other period during the pandemic. However, the illness is often milder and quicker to treat, and patients are less likely to require respiratory support. Hospitalisations may be a less reliable gauge of the pandemic's toll, as many patients are admitted for other ailments and test positive for COVID-19 while asymptomatic. Nevertheless, hospitals are still under pressure due to staffing shortages and overwhelmed emergency departments.
| Characteristics | Values |
|---|---|
| Omicron cases in hospitals | Higher than any other surge of the pandemic |
| Severity of illness | Milder than previous variants |
| Hospital admissions | 27 per 1000 cases compared to 78 per 1000 cases when Delta was dominant |
| Respiratory issues | Less common with Omicron |
| Ventilator use | Less common with Omicron |
| ICU admissions | Lower rates than with earlier variants |
| Mortality rates | Lower rates than with earlier variants |
| Hospital-acquired infections | Increased risk for ICU admission and higher mortality |
| Hospital staff shortages | Due to Omicron's high transmissibility and burnout |
| Patient characteristics | Elderly, unvaccinated, immunocompromised, underlying health conditions |
| Symptoms | Upper airway symptoms like wheezing and coughing |
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What You'll Learn
Omicron is less likely to cause severe illness than previous variants
Omicron has resulted in more hospitalisations than any other surge of the pandemic. However, the illness has been milder and quicker to treat, with patients displaying fewer symptoms of severe illness.
Dr Sonja Bartolome, a pulmonary and critical care specialist at UT Southwestern Medical Center in Dallas, notes that patients are less likely to have serious lower lung issues that lead to dangerously low oxygen levels. At her hospital, only about 40% of symptomatic COVID-19 patients needed oxygen, with the rest presenting primarily with other symptoms. This is a shift from previous waves, where almost every patient presented with a respiratory issue or required oxygen.
Dr Eric Legome, who runs two Mount Sinai Health System emergency sites in New York City, observes that patients are not presenting with respiratory failure, nor are they requiring intubation or ventilation. Instead, they are being admitted due to extreme weakness, dizziness, and a high risk of falling.
Research supports the notion that Omicron is less likely to cause severe illness than previous variants. A study from South Africa found that patients with Omicron were less likely to be admitted to hospital, and even when admitted, were less likely to require oxygen, ventilation, or intensive care. Data from the UK and other European countries also indicate that Omicron is causing less severe disease. A CDC study found that Omicron is associated with fewer deaths, fewer ICU visits, and shorter hospital stays.
The reduced lethality of Omicron is attributed to increased immunity from vaccines and prior infections, as well as the "lower virulence" of the variant. Early research suggests that Omicron has very few mutations to the parts of the virus targeted by T cells, a type of white blood cell that plays a dominant role in protecting against severe infection in the lungs.
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Omicron patients are less likely to have serious lower lung issues
Omicron has resulted in more hospitalisations than any other surge of the pandemic. However, the illness is milder and quicker to treat, and patients are less likely to be admitted to the ICU or die. Dr Eric Legome, who runs two Mount Sinai Health System emergency sites in New York City, notes that "We're not seeing a lot of admissions for respiratory failure, we're not seeing a lot of patients being put on high-flow oxygen, being intubated".
Indeed, Omicron patients are less likely to have serious lower lung issues. Research has found that the Omicron variant is more likely to infect the throat than the lungs, which may explain why it is more infectious but less deadly. Studies have shown that Omicron does not damage the lungs as much as the Delta variant and previous variants of COVID-19. For example, a study from the University of Hong Kong showed less Omicron infection in the lungs. Similarly, researchers at the University of Glasgow's Centre for Virus Research found that Omicron is better able to evade immunity in people who have had two vaccine doses, but a booster dose partially restores immunity.
Several studies have found that Omicron causes less severe disease in mice, with lower viral loads and less severe pneumonia. This is supported by clinical data, which shows that patients are less likely to have serious lower lung issues that lead to dangerously low oxygen levels. Dr Sonja Bartolome, a pulmonary and critical care specialist at UT Southwestern Medical Center in Dallas, notes that only about 40% of their symptomatic COVID-19 patients have needed oxygen during this surge, compared to almost everyone during the Delta surge.
However, it is important to note that Omicron can still be dangerous for vulnerable individuals, particularly those who are unvaccinated, elderly, or have underlying health problems. While Omicron may be less likely to damage the lungs, it is still a highly contagious virus that can lead to hospitalisation and death in some cases.
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Omicron patients are more likely to be unvaccinated
Omicron has caused more hospital admissions than any other surge of the pandemic, despite the illness being milder than previous variants. This is due to the highly contagious nature of the variant, which has resulted in a huge volume of patients.
While Omicron is milder, it can still be a dangerous disease for patients who are vulnerable due to underlying medical problems or because they are unvaccinated. A large study conducted by the U.S. Centers for Disease Control and Prevention found that unvaccinated people were 10 times more likely to be hospitalized for the Omicron variant of COVID-19. Another study found that unvaccinated people were 6.8 times more likely to be hospitalized for Omicron BA.1, compared to 12.2 times for Delta. Booster shots have also proven to be effective, with boosted individuals 2.5 times less likely to be hospitalized than double-vaccinated individuals without a booster.
The symptoms of Omicron are different from previous variants, with patients experiencing upper airway symptoms like wheezing and coughing, but less likely to have serious lower lung issues. As a result, hospitals are seeing fewer patients suffering from low oxygen levels and trouble breathing. However, Omicron patients are more likely to be extremely weak, dizzy, and at risk of falling.
While Omicron is less likely to cause severe illness, the high number of cases means hospitals are still struggling to treat all patients. This has resulted in hospitals being overwhelmed and the cancellation of surgeries and other services.
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Omicron is causing staff shortages in hospitals
The staff shortages have forced hospitals to cancel elective and non-urgent procedures, including surgeries for patients with critical illnesses. In some cases, hospitals have had to ration treatments for COVID-19 due to limited supplies of effective medications. The high transmissibility of Omicron has resulted in a large number of infections among healthcare workers, leading to the current shortages. This is further exacerbated by the need for staff to isolate due to exposure to the virus.
The situation has been described as a "triple whammy" for hospitals, which are also dealing with a record-setting surge in COVID-19 hospitalizations and burnout among staff following wave after wave of the pandemic. The combination of staff shortages and a lack of hospital beds has led to challenging decisions and difficult trade-offs for healthcare providers. Governors in several US states have deployed the National Guard to support overwhelmed hospitals, and President Joe Biden announced the deployment of 1,000 military health personnel to six states.
While Omicron is generally associated with milder symptoms and lower rates of hospitalization compared to previous variants, the sheer number of infections has resulted in a significant impact on hospitals. The high volume of patients has led to an increased demand for healthcare services, contributing to the strain on hospitals and their staff. The pandemic has also taken a toll on the mental health and well-being of healthcare professionals, with many experiencing burnout and exhaustion.
As hospitals grapple with the challenges posed by Omicron, it is crucial to address staff shortages and provide support to overwhelmed healthcare systems. The deployment of military personnel and the provision of federal funding to expand the healthcare workforce are steps towards alleviating the strain on hospitals. However, the long-term impact of the Omicron wave on hospitals and healthcare workers remains to be seen.
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Omicron patients are more likely to be admitted for other ailments
Omicron patients are more likely to be admitted to hospitals for other ailments. While the Omicron variant of the SARS-CoV-2 virus is less severe than previous variants, it has still put immense pressure on healthcare systems worldwide. This is due to the sheer number of people infected with Omicron, which is more transmissible than previous variants. Omicron patients are less likely to require hospitalization, ventilation, or die compared to patients infected with previous variants, such as Delta. However, the high volume of Omicron cases has resulted in an increased absolute number of hospitalizations, causing a strain on healthcare resources.
Omicron patients tend to exhibit different symptoms and health trajectories compared to those infected with previous variants. They are less likely to experience severe respiratory issues and low oxygen levels, which were prevalent during previous waves. Instead, Omicron patients typically present with upper airway symptoms, such as wheezing and coughing, and are more likely to be admitted to the hospital due to overall weakness, dizziness, and an increased risk of falling.
Furthermore, unvaccinated individuals, the elderly, and those with underlying health conditions or compromised immune systems are at a higher risk of severe outcomes from Omicron. For example, cancer patients undergoing chemotherapy, organ transplant recipients, and individuals with kidney failure are more susceptible to severe COVID-19 infections during the Omicron wave. These patients may experience severe lung inflammation and respiratory distress, requiring hospitalization and intensive care.
The impact of Omicron on hospitals also varies depending on the vaccination rates and access to treatments in different jurisdictions. Areas with lower vaccination rates and limited treatment options may witness more severe outcomes and higher hospitalization rates among Omicron patients. Additionally, hospital-acquired Omicron infections have been associated with increased morbidity and mortality, particularly among vulnerable patient populations.
Overall, while Omicron may be less severe in terms of individual cases, the sheer number of infections has led to a significant number of hospitalizations. Omicron patients are more likely to be admitted for reasons other than respiratory failure, often related to underlying health conditions and overall frailty. The impact of Omicron on hospitals highlights the ongoing challenges faced by healthcare systems in managing the COVID-19 pandemic and the importance of preventative measures and personalized care for vulnerable individuals.
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Frequently asked questions
While there are no exact numbers, Omicron has filled up hospitals with more COVID-19 patients than any other surge of the pandemic. However, it's important to note that Omicron is generally milder than previous variants, resulting in fewer hospitalisations per thousand cases.
Health experts have noted that many patients are admitted to the hospital with Covid, rather than because of Covid. This trend suggests that Omicron causes less severe illness, especially in vaccinated individuals. However, Omicron is highly contagious, and even with a smaller proportion of patients requiring hospitalisation, the absolute numbers can still be significant.
Omicron patients in the hospital tend to exhibit upper airway symptoms, such as wheezing and coughing, rather than the serious lower lung issues seen with previous variants. However, vulnerable individuals with underlying medical problems or those who are unvaccinated may still experience severe COVID pneumonias.
