Apartment was plagued with mosquitoes! We stayed for 4 nights and woke up every single night when mosquitoes were flying over us. We killed over 15 of them in just a few days. We never opened the windows and even checked the room before going to sleep, but anyhow they managed to get in the room. We don't know how that could happen, maybe windows or doors are not properly sealed. We were bitten dozens of times - even if we didn't mind so much the loudness of the neighbourhood, the stay wasn't really pleasant.