In the world, corona has been trialled… It has neither medicine nor any vaccine… In such a world there is also a competition to prepare corona vaccine. Every country wants to get ahead of each other in this matter, but in the meantime Russia has won it br br दुनिया में कोरोना से त्राहिमाम मचा हुआ है...इसकी न ही कोई दवा है न ही कोई वैक्सीन....