Children, even those that are vaccinated, may develop rotavirus disease more than once. That is because neither natural infection with rotavirus nor rotavirus vaccination provides full immunity (protection) from future infections. Usually a personâs first infection with rotavirus causes the most severe symptoms.
Because molecules move quicker at higher temperature, causing them to collides more. Since they collides more, reaction occurs to be a lot faster to. And that's why things dissolve quicker in hot water than in room temperature water.
Why Hot Water Sometimes Freezes Faster Than Cold Water. 1  Supercooling - Hot water tends to experience less of a supercooling effect than cold water. This makes it more likely to become solid when it reaches the freezing point of water. 2  Convection - Water develops convection currents as it cools.