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By Vin Se

Europe COVID-19 rise, due to fewer curbs, subvariant

“The BA.2 version of omicron seems to be behind this uptick in infections, which again shows how quickly  situation can change as  virus evolves into new forms,” University of Reading cellular microbiology professor Simon Clarke told Science Media Centre COVID-19 is again surging in Western Europe due to  “perfect storm” of governments lifting restrictions, waning immunity and  more contagious BA.2 omicron subvariant, experts.

After more than a month of falling cases across much of the continent, countries such as Britain, France, Germany and Italy have all seen  dramatic resurgence of infections in recent days.

In France, cases have risen by more than  third in the week since  government ended most COVID restrictions last Monday.

In Germany, despite  new daily record of nearly 300,000 infections on Friday,  government let national legislation enabling coronavirus restrictions expire over the weekend. Most German states, which have considerable leeway on applying measures, have however maintained  restrictions.

Italy  government would phase out almost all restrictions by May 1 despite rising cases.

And in Britain, where one in 20 people are currently infected,  government removed the last of its international travel restrictions on Friday.

Faced with its own surging cases, Austria announced on the weekend  would reimpose rules requiring FFP2 face masks just weeks after lifting the measure.

While some have blamed governments for relaxing restrictions too quickly, epidemiologists also pointed  finger at the BA.2 sub-lineage of the omicron variant that has become dominant in many countries.

Sometimes called “stealth omicron” because it is more difficult to detect, BA.2 is estimated to be about 30 percent more contagious than its predecessor BA.1. 

Lawrence Young, a virologist at Britain’s University of Warwick, said rising cases in Europe were due to a combination  “a perfect storm” of three factors, lifting of restrictions, waning immunity after vaccination and BA.2.

Antoine Flahault, director of the Institute of Global Health at the University of Geneva said there were “a couple of hypotheses on the table, which are not mutually exclusive”.

He told AFP that BA.2 was “clearly a relevant suspect in explaining the current rebound”, also mentioning waning immunity and  easing of measures.

He also pointed to air pollution in Western Europe during  infection resurgence, referring to research that showed “strong correlation” between COVID outbreaks and high levels of fine particulate matter in the air.

Clarke said  despite soaring cases in Britain, “concern about  virus among  public seems to be at an all-time low since start of pandemic.

In a bid to bolster waning immunity, some nations such as France have started rolling out fourth vaccine doses.

In England, a fourth booster shot will be made available to care home residents, people aged over 75 and the immunosuppressed this week, the National Health Service said.

However the World Health Organization has warned that new variants were more likely to continue emerging if wealthy nations continue to boost their own citizens ahead of sharing vaccines with countries where many have not received their first dose.

Jean-Francois Delfraissy, president of the French government’s scientific advisory board, has already warned of potential variants.

“We are at the mercy of a new variant which, if we ask the scientist community, could be expected in the autumn… it could happen before then, will it be  more transmissible variant…will it be more severe…will it escape the vaccine…nobody knows,” he said.

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