People previously infected with Covid-19 and those vaccinated will have some "stronger than basic" protection against Omicron, according to one of earliest studies looking into recently identified variant of covid. However, the study conducted suggests that Omicron "exceeds" all other variants in its potential capability to evade protection gained from previous Covid infection or vaccination. The findings, published in journal Emerging Microbes & Infection, also suggest that although a 3rd-dose of vaccines can “significantly boost immunity", protection from Omicron "may be compromised".