How does the incidence of parvovirus B19 (B19V) infection vary by season?

Updated: Oct 11, 2019
  • Author: David J Cennimo, MD, FAAP, FACP, AAHIVS; Chief Editor: Russell W Steele, MD  more...
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Clinical cases of parvovirus B19 infection (erythema infectiosum) may be sporadic or may occur in outbreaks in the late winter through early spring. Attack rates during school outbreaks may be as high as 60%, [8] and secondary spread through nonimmune household contacts is common. Infection can be an occupational hazard in child care workers, with a rate of 20% reported in some studies. [9] A cyclic increase in the number of infections is also observed, peaking every 3-4 years. [8]

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