Dangerous variants June 2, 2021 Vietnam, which is coping with its worst outbreak of the coronavirus pandemic, announced new restrictions for its largest city on Sunday, a day after its health minister said a ‘very dangerous’ new variant of the coronavirus had been detected in the country. It is true that the number of positive cases and deaths in Pakistan are gradually declining. However, any premature celebration will be a big mistake. The new variants can reverse the whole situation. Dr Najeeb A Khan