21.   Another question is whether the virus is primarily airborne or if it can be contracted by handling bird droppings.

22.   Marshall said they were covered in plastic to keep them fresh after being steam-cleaned of bird droppings.

23.   The painters clean the tower of grime and bird droppings, locate corroded metalwork, and play a crucial role in protecting the structure from rust and pollution.

24.   They also are not sure if the virus is primarily airborne or if it can be contracted by handling bird droppings.