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ARTI–Acute respiratory tract infection; THA–Teaching hospital, Anuradhapura; THG–Teaching hospital, Gampola; RSV–Respiratory syncytial virus; PIV-1, 2 & 3 –Parainfluenza virus 1, 2 & 3; Ad V–Adenovirus; Inf-A–Influenza A; Inf-B–Influenza B; hMPV–Human metapneumovirus. Climatic factors analyzed–mean monthly relative humidity (%), mean monthly temperature, mean monthly number of rainy days.
