Nearly 5,000 cases of pertussis, or the 100-day cough, have already been recorded in 2024 – more than five times the level seen across the entirety of 2023.Nearly 5,000 cases of pertussis, or the 100-day cough, have already been recorded in 2024 – more than five times the level seen across the entirety of 2023.Read MoreHealth News | Mail Online