<i>Haemophilus influenzae</i> carriage and antibiotic resistance profile in Belgian infants over a three-year period (2016-2018).

In Europe, on the other hand, serotype “f” became the most frequent encapsulated serotype causing invasive disease after implementing Hib conjugate vaccine, but the numbers remain relatively low ( Ladhani et al., 2012 ; Reilly et al., 2022 ), whereas there is also an increasing trend in infections caused by serotype “e” ( Ladhani et al., 2012 ; Slack et al., 2021 ).

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