The period of Convalescence is the time during which the person regains health and fully recovers.
Explanation:
Diseases that can spread from one person to other are called infectious disease.
Disease development is divided into Incubation period, Prodromal period, period of illness, Decline period, and period of Convalescence.
During incubation period the pathogen enters the host body and starts multiplying itself. But the signs of diseases are unnoticeable.
Then comes the prodromal period, when the pathogen keeps multiplying itself and some signs of disease are observed but they are not obvious
After the prodromal period comes the period of illness when the patient exhibits obvious signs of sickness.
As the period of illness is over the symptoms of disease start to cease and the the number of pathogen decrease in body.This period is the period of decline.
Finally comes the period of Convalescence when the person returns to his pre-disease state and is completely healthy. (except irreversible damage caused by the disease)
Lavoisier’s oxygen theory of combustion was one of his most notable contribution to science and earned him the title of the “father of modern chemistry”. He recognized the combustible property of oxygen and that phosphorus and other metallic elements increased in terms of weight when burned.
