Multiple respiratory viruses are causing a surge of cold-like symptoms across the U.S. this spring [1, 2].
The increase in illness occurs as health officials monitor the simultaneous circulation of several different pathogens. This overlap complicates the ability of patients and providers to distinguish between common colds, seasonal allergies, and more significant viral infections.
Reports indicate that human metapneumovirus, or HMPV, is seeing a rise in cases across the United States [1]. HMPV typically produces symptoms similar to the common cold, though it can lead to more severe respiratory issues in vulnerable populations.
At the same time, a new Covid-19 variant known as BA.3.2, nicknamed "cicada," is circulating [2]. This variant is appearing alongside other respiratory illnesses, contributing to the overall volume of sick individuals during the season.
Regional reports from the Metro Detroit area highlight a complex health environment this month [3, 4]. In addition to these viral threats, residents are dealing with spring allergies, asthma flare-ups, and stomach viruses [4].
The combination of these factors has led to a heightened incidence of respiratory distress and general malaise. While HMPV is a known seasonal virus, the presence of the "cicada" variant adds a layer of unpredictability to the current spring wave [1, 2].
Public health monitoring continues as these viruses move through the population. The seasonal increase is attributed to the ongoing circulation of these pathogens during the transition into warmer weather [1, 2].
“Human metapneumovirus and the Covid-19 BA.3.2 'cicada' variant are driving a rise in cold-like illnesses.”
The simultaneous rise of HMPV and the BA.3.2 Covid-19 variant suggests a trend of 'multiplex' respiratory seasons. When multiple viruses with similar symptomatic profiles circulate at once, it increases the burden on primary care clinics and makes accurate self-diagnosis difficult for the public without clinical testing.
