A quantitative variable is the one that has a numerical significance such as the number of items, time spent on playing a video game while a qualitative variable is the one that has not a numerical significance attached to it such as Gender, Eye color
Further in a quantitative variable, the discrete variable is the one that is a whole number and can not be broken down further, like the number of items
while a continuous variable is the one that takes any value within an interval of values.
The number of COVID survivors in our country can only take the whole number value.
Thus, the variable is quantitative and discrete.