Spring Respiratory Virus Update: RSV Cases Extend into April, New COVID-19 Variant Emerges
As spring arrives, concerns about respiratory viruses persist, with cases of respiratory syncytial virus (RSV) appearing later than usual and a new COVID-19 variant spreading across the country. The Centers for Disease Control and Prevention (CDC) reported a delayed start of RSV activity in most of the U.S., leading to higher levels of RSV cases continuing into April, particularly affecting infants and young children. RSV can cause mild flu-like symptoms in most individuals but can lead to severe illness, especially in young children and seniors, requiring hospitalization and ventilator support. Preventive treatments, including vaccines for seniors and pregnant women, are available, with an RSV monoclonal antibody for infants and young children. The recent respiratory viral season also saw unique behavior from the flu, with two spikes of flu A and a late flu B strain causing severe symptoms.
As states grapple with the late RSV season, a new COVID-19 variant known as the "cicada" variant has emerged, with 25 states reporting cases. This variant has more mutations in the spike protein, making it different from previous strains and potentially able to evade immune protection. While not more severe, the "cicada" variant may require updates to the COVID-19 vaccine to address its unique characteristics. Despite the increased ability to evade the immune system, the variant may be less effective at causing infection due to mutations that do not align well with human cellular morphology. The CDC faced challenges during the past season due to layoffs affecting vaccine-related databases, impacting the monitoring of respiratory diseases.
As respiratory viruses continue to circulate, spring allergies are also beginning to affect individuals, potentially increasing vulnerability to viral illnesses. Exposure to pollen and allergens can lead to inflammation in mucosal membranes, making individuals more susceptible to respiratory viruses. It is important to differentiate between allergy symptoms and respiratory virus symptoms, as many people may mistake one for the other during this time of year. Due to the extended RSV season, state and local health departments have prolonged immunization windows for children until the end of April, emphasizing the importance of prevention, especially for young infants at risk of hospitalization.
Planning for each respiratory viral season is crucial for better outcomes, particularly for chronically ill patients who may require vaccination for the fall season. Monitoring and preparing for potential outbreaks can help mitigate the impact of respiratory viruses on vulnerable populations. Stay informed with breaking news and weather alerts through the WPRI 12 and Pinpoint Weather 12 apps, and watch 12 News Now on WPRI.com or the free WPRI 12+ TV app. Follow social media channels for updates and information on respiratory viruses and COVID-19 variants.