No, they are not small dishes for food. Dengue patients often proclaim proudly how low their platelet count was and still they didn't die.
"Mine was only 9*, you know? I'm lucky to be alive!"
So what do platelets do?
They are tiny cell fragments that circulate in your blood and stop you from bleeding to death.
And apparently, they do more than that.
This is the reason why people should stop believing that just because something is a scientific fact, it is immutable. Science evolves, people. As we develop more new toys to look at tinier things, calculate bigger numbers, the more we learn how little we know.
* 9 X 109
The normal range for platelets is 150-400 x 109 per litre. (Wikipedia)