It has been said many times that the arrival of the Delta variant of the coronavirus has changed the course of the pandemic. It is more transmissible than previous variants and has quickly become the dominant variant across the world. And because the vaccines are less effective against it, although still effective enough, it has brought the need for booster shots to the forefront of the debate.A new study has shown that the symptoms that the infection presents have also changed. According to the World Health Organization, the most common symptoms of COVID are:1. A new or persistent cough
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