The main principle of origami is folding the paper along straight lines in all directions - the resulting planes are only superimposed symmetrically. One...
Angina is an infectious disease that can be easily infected. A characteristic symptom of the disease is a huge sore throat that prevents swallowing....
Infectious mononucleosis is a viral disease that is most often caused by primary infection with the Epstein-Barr virus (EBV), which belongs to the group...