Ba.4

• Omicron BA.5 COVID subvariant spreading at ‘very intense level,’ WHO warns

  The WHO has seen a substantial increase in cases of the Omicron subvariant, BA.5, over the last four weeks and that trend is expected to continue.

  Health

  Jul 12, 2022
  
• With BA.4 and BA.5 detected in Manitoba, epidemiologist expects transmission to increase

  "(BA.5) has a whole bunch of tricks up its sleeve to disguise and to evade immunity, either that is created or acquired by vaccines or by having the infection."

  Health

  Jul 6, 2022
  
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• U.S. FDA backs COVID-19 booster shots tailored to target Omicron BA.4, BA.5 subvariants

  The BA.4 and BA.5 Omicron COVID-19 subvariants are now dominant in the United States, according to data from the Cenetrs for Disease Control and Prevention.

  Health

  Jun 30, 2022
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• No schedule for expanding booster eligibility in Saskatchewan

  Experts, meanwhile, warn more transmissible variants are gaining going around the world, and that all who are able should consider getting all vaccinations available to them.

  Canada

  Jun 17, 2022
• BA.4, BA.5 in Canada: What we know about the 2 new Omicron subvariants

  BA.4 and BA.5 can dodge antibodies from earlier infection well enough to trigger a new wave, according to South African scientists.

  Health

  May 7, 2022
• 2 new Omicron subvariants behind recent COVID-19 spike in South Africa: WHO

  WHO said that it is too soon to know if COVID subvariants BA.4 and BA.5 cause more severe symptoms, but they are 'another sign the pandemic is not done with us.'

  World

  May 4, 2022