What is causing fluctuation in number of daily Covid-19 cases? Let’s find out

World Health Organization (WHO) chief Tedros Adhanom Ghebreyesus in a recent media briefing informed that a new variant of the Covid-19 bacteria, BA 2.75, has been identified in India. The variant has now been found in 10 more counties. It’s not yet clear if the new strain is more severe than its predecessors. Union Health Secretary Rajesh Bhushan in response to the growing concerns about the fluctuations in Covid-19 numbers recently issued a letter to the states and territories,