The genetic recombination of human influenza A caused massive, widespread epidemics that affected the global human population several times in the twentieth century.
<h3>What is influenza ?</h3>
Influenza is a disease caused by virus which is contagious.It is different from a normal cold as it shows severe symptoms than flu.
Influenza is caused by influenza virus and people get infected when they breathe in tiny airborne droplets from the cough or sneezes of infected person.
Outbreaks of influenza A virus occurred in twentieth century.During 1918 influenza pandemic was the most dangerous pandemic.
Therefore, the genetic recombination of human influenza A caused massive, widespread epidemics that affected the global human population several times in the twentieth century.
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The answer for the year of 2017 would be more than 90 million. Hope this helps.
decreases
Explanation:
According to the general trend, metallic character decrease in proceeding up a group of elements in the periodic table.
Metallic character increases down a group and decreases across the period.
- Metallicity or electropositivity is a measure of the tendency of atoms of an element to lose electrons.
- It is related to electronegativity and ionization energy.
- The lower the ionization of energy of an element, the more electropositive it is
- Across a period, electropositivity decreases.
- It increases down a group on the periodic table.
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