We should not forget the basic MathematicsDuring the present pandemic the data of the infected persons, deaths, and the recovered ones is being presented by the various countries and everyone is following more and less same convention so that we can compare them and understand the things in a better perspective. That is the practical way of tackling with the situation so that the monitoring and research agencies understand that what is the meaning of that data. But at the same time we should not ignore the basic principles of Mathematics as that could lead to confusion and doubt in the minds of some laymen about the apparent ambiguity in the data.
Let me put up a simple example that In India let us say that approximately 16,00,000 people are so far (in total) affected and 10,00,000 out of that are recovered and 35,000 died. It means there are remaining cases about 6,00,000 out of which we do not know the death rate but we pray to God that no one dies now.
So excluding those 6,00,000 I get the basic data that 35,000 people died out of 10,35,000 (10,00,000+35,000). So the death rate is 35,000/10,35,000 = 3.4% (approximately).
Another thing is recovery rate. So far 10,00,000 are recovered out of 10,35,000 (10,00,000+35,000) which simply means that recovery rate is = 10,00,000/10,35,000 = 96.5% (approximately).
Let the various Govt present the data whatever way they want either for keeping consistency with other countries or public sentiments but the basic Mathematics that we learned in our school gives the above figures.
Do you have anything to say on this?