Morning mail: more NSW Covid cases likely, vaccine success, Trump ban upheld

Thursday: Contact tracers scramble to contain Sydney coronavirus outbreak. Plus: Queensland police blocked research into domestic violence cases and officer attitudes

Good morning. Contact tracers in NSW are scrambling to contain the spread of Covid-19 in the community, Queensland police face scrutiny over domestic violence inaction, and the Guardian marks its 200th birthday. That, and more aplenty in Thursday's morning mail.

NSW is bracing for more cases of community transmission after a man who tested positive for Covid-19 on Wednesday has health authorities concerned due to his level of activity while potentially infectious. The premier, Gladys Berejiklian, said the man, aged in his 50s, had been very active in the inner east" areas of Sydney prior to being tested on Tuesday. As contact tracers scramble to identify people who may have been exposed to the virus, Berejiklian praised the man for using venue QR codes, making it easier for them to issue a list of venues of concern.