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Positivity rate of Chlamydia pneumoniae PCRs in a tertiary care hospital, Lausanne, Switzerland. A) Yearly number of C. pneumoniae PCR tests conducted during 2014-2023. The final bar shows the last quarter of 2023, when the positivity rate exhibited a notable increase to 3.61%. B) Monthly numbers of C. pneumoniae PCR tests performed in 2023, showcasing positive tests and corresponding positivity rates. The data reveal a peak in the percentage of positivity of 6.66% in October.
