A week after Christmas and the start of the new year, cases of COVID-19 have surged from low to moderate levels, dashing hopes for a quiet holiday season. According to University of Newcastle virologist Nathan Bartlett, increased socializing and end-of-year parties may be contributing factors.
Bartlett notes that respiratory symptoms often rise in late November and early December, which aligns with the recent increase in COVID cases. However, wastewater data at Burwood Beach in Newcastle shows a slight decrease in COVID fragments, suggesting some control measures are working.
A new Pfizer booster vaccine is now available across Hunter pharmacies, targeting the JN.1 sub-variant of Omicron. The vaccine’s effectiveness and duration of protection are still being determined through ongoing clinical trials.
Data from NSW Health and the US Centers for Disease Control and Prevention show that the XEC and KP.3 sub-variants are dominant in NSW, but the JN.1 variant remains present. Professor Bartlett explains that mutations to the spike protein can give the virus an edge over earlier variants, making it more challenging to combat.
A study from the Cleveland Clinic found the COVID mRNA monovalent vaccine was 42% effective against infection with the Omicron XBB.1.5 sub-variant, while a US CDC research showed 54% protection at 52 days after vaccination. However, Professor Bartlett notes that immunity wanes over time, increasing the risk of severe disease.
Despite this, he emphasizes that COVID vaccines are effective in preventing severe disease and that booster shots can help maintain protection. With cases on the rise, it’s essential for individuals to take precautions and consider annual boosters, especially those at increased risk of severe COVID.
Source: https://www.newcastleherald.com.au/story/8849575/new-covid-vaccination-targeting-jn1-widely-available