Immunity, developed after the first wave, is not widespread. The number of people who remained unaffected because of cautionary steps taken in the first step may have been large. Immunity can also fade. Someone infected earlier can get reinfected but we know that the protection is still very high after eight months.
In 2019, when the virus emerged, it was a generalist. It could infect many mammals and was not a tightly human-adaptive virus. The lineage continued for a long period. In the second phase, which started in October 2020, the virus became fitter. “It was a key that could fit many locks,” the expert said adding that with the increase in the transmission, the key became more refined.
Immunity, developed after the first wave, is not widespread. The number of people who remained unaffected because of cautionary steps taken in the first step may have been large. Immunity can also fade. Someone infected earlier can get reinfected but we know that the protection is still very high after eight months.
> In 2019, when the virus emerged, it was a generalist. It could infect many mammals and was not a tightly human-adaptive virus. The lineage continued for a long period. In the second phase, which started in October 2020, the virus became fitter. “It was a key that could fit many locks,” the expert said adding that with the increase in the transmission, the key became more refined.
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