Symptoms of recent covid-19 variants
Pro Research Analysisby 
Searched over 200M research papers
Common Symptoms of Recent COVID-19 Variants
Recent COVID-19 variants, including JN.1, HV.1, FLiRT, KP.1.1, KP.2, KP.3, Omicron (B.1.1.529), Delta, Alpha, and others, have shown a range of symptoms. The most frequently reported symptoms across these variants are cough, sore throat, fatigue, fever, and muscle or body aches. Fatigue and sore throat are especially common with newer variants like Omicron and the UK variant (B.1.1.7), while cough remains a consistent symptom across all variants Akaishi2022Mahase2021Fernández‐de‐las‐Peñas2022+1 MORE.
Changes in Symptom Patterns by Variant
Omicron and Its Subvariants
With the Omicron variant and its subvariants, cough and sore throat are the most common symptoms, followed by fatigue, fever, and shortness of breath. Notably, the prevalence of loss of smell (dysosmia) and taste (dysgeusia) has dropped significantly compared to earlier variants, now affecting only 1-3% of cases versus 15-25% previously Mahase2021Şahin2023. Many Omicron cases are mild or even asymptomatic, but some patients still experience significant symptoms, especially adults Mahase2021Şahin2023.
Delta and Alpha Variants
The Delta variant is associated with a higher likelihood of headache, loss of smell, and loss of taste at onset, while the Alpha variant shows fewer symptoms at hospital admission compared to the original Wuhan strain. Fever, dyspnea (shortness of breath), and gastrointestinal problems were more common with the original Wuhan variant Slabakova2023Zhang2022.
UK Variant (B.1.1.7)
People infected with the UK variant are more likely to report sore throat, fatigue, myalgia (muscle pain), and cough compared to those with other variants .
Gastrointestinal and Neurological Symptoms
Gastrointestinal (GI) symptoms such as diarrhea, nausea, vomiting, and abdominal pain have been present throughout the pandemic but have become less common with newer variants. The rate of GI symptoms has declined from 28.2% in the early pandemic to 13.8% with Omicron . In children, Omicron has been linked to fewer respiratory and GI symptoms but a notable increase in neurological symptoms, including altered mental status and seizures .
Predictors of Severe Disease
Shortness of breath, difficulty breathing, and symptoms lasting more than seven days are strong predictors of pneumonia and more severe disease, especially with Omicron variants. These symptoms should be monitored closely as early warning signs .
Asymptomatic and Mild Cases
A significant portion of recent COVID-19 cases, especially with Omicron and its subvariants, are asymptomatic or mild. However, the variability in symptom presentation means that some individuals may still experience severe or unusual symptoms, highlighting the importance of ongoing vigilance and testing Akaishi2022Şahin2023.
Conclusion
The symptoms of recent COVID-19 variants have shifted toward milder, upper respiratory complaints like cough, sore throat, and fatigue, with a marked decrease in loss of smell and taste. Gastrointestinal and neurological symptoms are less common but still possible, especially in children. While most cases are mild or asymptomatic, certain symptoms—particularly shortness of breath and prolonged illness—can signal more severe disease and should prompt medical attention. Ongoing monitoring and adaptation of public health strategies remain essential as the virus continues to evolve Akaishi2022Mahase2021Fernández‐de‐las‐Peñas2022+5 MORE.
Sources and full results
Most relevant research papers on this topic