Ireland and Europe at risk of new Covid surge as two new variants of concern declared
Ireland and the rest of Europe is at risk of a significant increase in Covid-19 in the coming weeks after new off-shoots of Omicron were declared variants of concern today (May 13).
The new variants of concern are BA.4 and BA.5, which were first detected in South Africa in January and February of this year. They have led to another surge in infection.
They have become the dominant variants there, the European Centre for Disease Control (ECDC) said.
BA.2 is still dominant in Ireland and cases are falling. Hospitals which faced major disruption for months are now trying to increase non-Covid care and tackle waiting lists.
However, the new variants are due to become dominant in Portugal, a popular holiday destination with people from Ireland, at the end of this month.
The watchdog said the presence of these variants could cause a significant overall increase in Covid-19 cases in the EU/EEA in the coming weeks.
Both BA.4 and BA.5 are more transmissible than BA.2 but not more severe, according to current evidence.
The ECDC said: "Additionally, there is an increasing trend in the variant proportions for BA.5 observed in Portugal in recent weeks, accompanied by an increase in Covid-19 case numbers and test positivity rate.”
The Portuguese National Institute of Health estimated BA.5 already accounted for 37pc of the positive cases as of May 8, 2022.
The estimated daily growth advantage for BA.5 over BA.2 is 13pc, which is similar to the 12pc daily growth advantage previously reported by South Africa.
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Limited available data from in vitro studies evaluating sera from unvaccinated individuals, who have experienced a prior BA.1 infection, indicate that both BA.4 and BA.5 are capable of escaping immune protection induced by infection with BA.1.
People who are unvaccinated are unlikely to be protected against symptomatic infection with BA.4 or BA.5, the watchdog said.
Protection derived from currently available vaccines does wane over time against the Omicron variant.
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“Based on the limited data currently available, no significant increase in infection severity compared to the circulating lineages BA.1 and BA.2 is expected.
“However, as in previous waves, if Covid-19 case numbers increase substantially, some level of increased hospital and ICU admissions is likely to follow.”
ECDC encouraged countries to remain vigilant for signals of BA.4 and BA.5 emergence. Early variant detection critically relies on sensitive and representative testing and genomic surveillance, with timely sequence reporting.
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Continued close epidemiological and vaccine effectiveness monitoring is essential in order to rapidly detect signals of increased SARS-CoV-2 circulation or risk of severe disease among vaccinated individuals.
“If such signals emerge, a second booster may be considered for some or all adults 60 years and older and for other vulnerable groups,” said the ECDC. “Countries should have plans in place for the rapid deployment of booster doses in these population groups.”
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Ireland and the rest of Europe is at risk of a significant increase in Covid-19 in the coming weeks after new off-shoots of Omicron were declared variants of concern today.
m.independent.ie