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The Centers for Disease Control and Prevention (CDC) today issued Health Alert Network Health Advisory (CDCHAN-00514) confirming increases in human parvovirus B19 activity in the United States and Europe.
Parvovirus B19 is a seasonal respiratory virus transmitted through respiratory droplets by people with symptomatic or asymptomatic infection.
In the first quarter of 2024, public health authorities in 14 European countries observed unusually high numbers of parvovirus B19 cases.

The U.S. Centers for Disease Control and Prevention (CDC) recently published an early release (Volume 30, Number 9—September 2024) review of 14 studies in Emerging Infectious Diseases. These researchers wrote that despite the effectiveness of measles-containing vaccines, infection remains possible in immunized persons.
They confirmed measles in persons with secondary vaccination failure (SVF) may be less infectious than cases in unvaccinated persons.
All included studies reported a meager attack rate (0%–6.25%) and Reff (0.063 [95% CI 0.0–0.5]).

The Lancet Infectious Diseases recently published a commentary emphasizing that the chikungunya virus is one of the most neglected arboviral diseases globally, with cases detected in 110 countries.
Chikungunya's impact on people's health has been significant.
Public health authorities in the Region of the Americas have reported approximately 3.7 million chikungunya cases over the past decade. In the United States, this mosquito-transmitted disease is often diagnosed in international travelers returning from chikungunya endemic areas such as Brazil and the Caribbean.