Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Flow diagram for study selection for hPIV-associated ALRI burden
A study was defined as a dataset from one site in one published paper or from one research group in the network. Some studies provided more than one type of data, so the sum of studies across types was larger than the total number of included studies. ALRI=acute lower respiratory infection. hCFR=in-hospital case–fatality ratio. hPIV=human parainfluenza virus.
