Repeated "State of Emergency"

"State of Emergency" has been expanded into 13 prefectures in Japan, peoples are now in getting accustomed to such a repeated situation and pedestrian is not changed in number. Inhibition of attitude doesn't take effect at all. Is it better to rely on Vaccination to produce Antibodies artificially and avoid going out? Or it's better to get innate immunity by actively going out and being exposed to mutant strain? Of course the order of stimuli received is very important. Is there any reliable information anywhere? Most of the cases, virus infection affects on Lungs, the course of the medical condition is similar with conventionally experienced MERS and SARS. Is there any method to attack and treat SARS CoV-2 directly, then how about some effective medicine? What are the effective ways other than symptomatic treatment for the disaster this time?