It can only represent such a mass and mortality rate for third world countries with strong overpopulation and unsanitary conditions. Yet the main reason for such a catastrophe is precisely the above-mentioned factors: unsanitary conditions, overpopulation and dysentery. So, living in the countries of the "first world" is not worth fearing.
Unless of course you are in Russia
Of course, for one person, it poses the same danger as before. That is, if you get sick, you will get sick as our ancestors did. Only the chance of getting sick is practically zero (sanitation, prevention) and the chance of being cured is great, although one must also guess that this is a plague (a very rare disease these days).
Currently, bubonic plague is successfully treated with antibiotics and does not pose a public threat. But of course, this disease poses an individual threat, because it is better not to get sick at all than to get sick. Even if the disease is treatable.
Any infectious disease has its own danger in our time. But it can be realized only under the coincidence of certain circumstances and conditions. So the bubonic plague in the Middle Ages was so dangerous due to overcrowding of people and the total absence of any hygiene rules, lack of knowledge about prevention and treatment. At the present time, it can be dangerous only in some regions, with poor living conditions and lack of medical care.