‘More infectious’: New Covid strain fuels fresh wave

Until now, authorities have said people were unlikely to catch Covid twice within a 12-week period.That advice has been slashed to 28 days, prompting states to update their reinfection periods. NSW has today followed moves by WA and ACT to reduce its infection period to four weeks, down from 12 weeks, in line with recent advice from the Australian Health Protection Principal Committee.The committee issued a warning late last week, saying the nation was experiencing a new wave of Covid infections driven by the BA.4 and BA.5 Omicron sub-variants.“BA.4 and BA.5 are associated with increased immune escape and we are likely to see rates of reinfection rise among those who have previously been infected with an earlier Covid-19 variant,” the AHPPC’s warning read.AHPPC said reinfections could occur as early as 28 days after recovery from a previous infection, and urged respective jurisdictions to reduce reinfection window down from 12 weeks. Some people have experienced reinfection in a fortnight, reports The West Australian.Sub-variants BA.4 and BA.5 are about twice as contagious as Omicron BA.1, preliminary figures from South Africa suggest, reports The Guardian. The rate at which the new sub-variants reproduce is similar to measles, which has been our most infectious viral disease.Some experts are concerned vaccines and antiviral measures will not be enough to combat this new wave. Australian Medical Association president Dr Omar Khorshid is urging the country’s leaders not to rule out bringing back public health measures such as mask mandates and social distancing. There are concerns the Government is putting all its eggs – vaccines and antiviral – in one basket, expecting medications and vaccine boosters to get the nation through this latest surge. Dr Khorshid said a combination of public health and pharmaceutical measures could help to bring down cases, The Guardian reports. “Mask mandates in some areas and some level of social distancing may well be necessary,” he said.It comes after Federal Health Minister Mark Butler said the country had “moved beyond those community-wide mandates, whether they’re lockdowns or mask mandates”.There are more than 311,000 active cases in the country, including 32,164 new cases reported in the past 24 hours, according to the latest figures from the Federal Health Department.In total, 1.45 million cases have been recorded in the country since the start of the pandemic and 10,325 people have lost their lives to the disease. HOW YOU CAN PROTECT YOURSELF AGAINST COVIDHealth professionals are urging people to get vaccinated and get booster shots as soon as they become eligible. Australians aged 30 and older are now able to get a fourth dose of a Covid jab and those above 50 are strongly encouraged to do so. NED-6507-Covid-Booster-GuidePaul Kelly, the nation’s chief medical officer, told the ABC that BA.4 and BA.5 were becoming the dominant strains in Australia.“We have no suggestion at the moment that is causes more severe disease but it escapes our immune system, whether that is due to previous infection or vaccination,” he said.“We do expect that these new variants will cause a rise in cases and probably hospitalisations in the coming weeks.“The new BA.4 and BA.5 are more infectious and there is strong evidence that you can get reinfected earlier than what was previously the case.“It is important that anyone who develops symptoms again 28 or more days after they have had a previous Covid-19 infection, to get tested and to take the appropriate arrangements in terms of isolation.”