As well as coronavirus 19, there are other serious illnesses such as Hepatitis B and C etc which can work their way from your saliva into other peoples nose, throat and lungs. By making it illegal the government would be helping young people to stop imitating their sports heroes such as footballers
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At present, the only resource to stop spitting in public is if your council decides to prosecute offenders under enviro-crime (Litter offences).
Public health in England could propose and endorse this new law under emergency powers until a permanent new law could be brought in to stamp out this unhealthy and disgusting practice.
Other diseases include Rhinovirus (colds), Flu virus, Epstein-Barr virus (mononucleosis, or mono), Type 1 herpes and Cytomegalovirus (a risk for babies in the womb)