Wave after wave, peak after peak, variable after variable Like Micron 5, we can see a trend in the spread of Covid: “seasonal” with more or less subtle changes to the outcome reminiscent of influenza. Non-annual seasonality, but linked to six-month cycles. The news that comes two and a half years after epidemics and which, if confirmed, worries, however, provides an additional resource in terms of prevention.
What many virologists believe was written by the authoritative journal Nature, was inspired by the situation in South Africa where – remember – the Omicron variant was first tagged, first ‘4’, then ‘5’, and then also traced back to the rest of the world by repeating Waves of infection and forcing laboratories to develop new vaccines.
Analysis of viral genomes from clinical samples – we read in Nature – The emergence of variants 4 and 5, respectively, was detected in mid-December 2021 and early January 2022. Since then, infections have increased, accounting for 60-75% of Covid-19 cases in South Africa. The researchers also identified variants in more than a dozen other countries, mainly in Europe.
Cycles every six months
Scientists say, however, that we should not rule out other surprises. Nature also reports that the delta variant has not completely disappeared, and as the global immunity of the omicron and its expanding family increases, a delta-derived variant could return. In any case, regardless of their origin, variants seem to appear about every six months, notes Belgian virologist Tom Wesselers, who wonders if this is the direction in which the next Covid epidemics will follow with each other and characterized by more symptoms.
A trend indicating an endemic phenomenon (persistent diseases present in an area, which in this case is the world, which will be added to the already known respiratory disease viruses.