Avoiding contaminated surfaces, regular handwashing and sanitising, and deep cleaning have become central to the control of the spread of SARS-CoV-2, the virus that causes Covid-19, since the start of the pandemic.
But as time progresses, and after hundreds of studies and investigations on viral outbreaks, scientific understanding of the virus has changed. Right now, the evidence shows that most transmissions occur when infected people release large respiratory droplets, as well as small particles (called aerosols), into the air when they cough, talk, breathe or sing.
These droplets or aerosols can then be directly inhaled by people who are nearby. Surface transmission, although possible, is therefore not the biggest issue.