CORONAVIRUS: Difficult to explain
D.A.

After 2 months of the global coronavirus pandemic, data that are difficult to explain are observed if one takes into account the fact that the health conditions of the most affected countries (Europe and United States/New York) are generally acceptable, but they present numerous cases of contagion and death, compared to information collected in countries with less adequate sanitary conditions and a very high population density.
We observe in particular the data of the 5 most affected countries in Europe (Spain, Italy, France, United Kingdom and Belgium) to which we add the State of New York to the USA.
In these 6 countries, the cases recorded are around 650,000 with nearly 90,000 deaths.
For comparison, we note that (until 16/4/2020) in 5 countries that we take as examples, which have a larger population, a population density and generally less adequate sanitary conditions (Nigeria, Indonesia / Java, Egypt , Bangladesh and India) and that in total they have 2,000 million inhabitants, especially in large cities, the cases recorded were around 23,000 and the deaths less than 1,500 people (these figures are those observed until April 16, 2020 and may of course change)
So (for now) in these 5 countries with high population density and fewer health guarantees, the impact of the disease has been up to 60 times less.
Explaining these differences is an outstanding challenge.

A) Main European countries affected by coronavirus
Population, area, registered cases and deceased persons (04/16/2020)
ITALY
It has 60 million inhabitants over 301,000 km2
Recorded cases: 165,000 died 21,645
FRANCE
It has 67 million inhabitants over 643,000 km2
Cases recorded: 147,000 people died 17,167
SPAIN
It has 46 million inhabitants over 506,000 km2 Registered cases: 183,000 people died 19,130
UK
It has 68 million inhabitants over 242,000 km2 Registered cases: 103,000 died 13,729
BELGIUM
It has 11.5 million inhabitants over 30,500 km2 Registered cases: 35,000 people died 4,857
NEW YORK
It has 19.5 million inhabitants over 141,000 km2, registered cases: 214,648 deceased 11,586

B) The densest countries and regions of the world where health conditions are less appropriate and the levels of involvement of the coronavirus (04/16/2020): -
1) EGYPT
It has 195 million inhabitants, over an inhabited area of ​​40,000 km2 (the rest is desert). The capital Cairo has 20 million inhabitants. It rains less than 30 mm per year. Cases registered: 2505 Deceased persons: 183
2) NIGERIA
It has 206 million inhabitants. Main city, Lagos: 21 million inhabitants: Registered cases: 407 Deceased: 12
3) INDIA
Has 1,353 million inhabitants. Urban areas: Delhi region: 45 million, Mumbai region: 25 million. Cases registered: 12,759 Deceased: 423
4) INDONESIA / JAVA ISLAND
It has 150 million inhabitants, over an area of ​​128,000 km2; main city: Jakarta: 28 million. Recorded files: 5516. Deceased persons 496
5) BANGLA DESH
It has 161 million inhabitants over 147,000 km2. Cases registered: 1,572 Deceased persons: 341
We separate the case of China because it is difficult to make a comparison due to the special characteristics of this country. In all cases, we include the data for information purposes.
CHINA
It has 1.4 billion inhabitants: Pearl River Delta: 120 million; Shanghai: 25 million; Beijing: 22 million. Recorded cases: 82,341. Deaths: 3,342