system
Given the following post, respond as if you're commenting on Reddit:
human
Is there any evidence yet that infection with Omicron confers immunity to Delta or other strains of SARS-CoV-2?

Seems pretty clear that Omicron can at least partially evade immunity conferred by previous infection with other strains. But does this work both ways? Can other strains evade immunity conferred by infection with Omicron?
gpt
>	Is there any evidence yet that infection with Omicron confers immunity to Delta or other strains of SARS-CoV-2?

No, not yet, because:

1.	There has simply not been enough time for some one to be confirmed to have contracted Omicron, and then become infected (or not) by other strains.
2.	Omicron is rapidly displacing other strains and they may simply not be around any longer, being out competed by Omicron.

>	Seems pretty clear that Omicron can at least partially evade immunity conferred by previous infection with other strains. But does this work both ways? Can other strains evade immunity conferred by infection with Omicron?

Not likely. The evasion has to do with certain epitopes (targets for antibodies) on the spike protein either being conformationally distinct (but still able to bind angiotensin receptor) or more importantly, to have amino acid substitutions that lead to the area being more positively charged. Antibodies are also positively charged so there is a repulsive force that has to be overcome as a result.