Evidence is currently insufficient to show omicron variant has a shorter period of infectiousness

While the omicron variant appears to be less harmful than previous variants in terms of severity of disease, hospitalizations and deaths, a virology expert speaking at a special COVID-19 meeting of the European Congress of Clinical Microbiology & Infectious Diseases (ECCMID 2022, Wed 23 March, ahead of the main congress in Lisbon 23-26 April) says that the evidence so far—from studies using culturable virus as a marker for infectiousness—shows that the period of infectiousness of the omicron variant is not convincingly shorter than of other variants (from around 2 days before symptoms appear to 7 days after).

source https://medicalxpress.com/news/2022-03-evidence-insufficient-omicron-variant-shorter.html