No it doesn't. The exact opposite in fact. Lambda variant does not completely evade vaccine protection - and this is the Chinese de-activated live virus vaccine. By the way, I didn't say it was impossible, I said it was "highly unlikely".
If you really want to look at this paper in detail they perform no serology - partly because they didn't have access to the Lambda antigen test, they use a pseudo viral neutralisation assay which shows only one part of the immune response, and that response is reduced but not eliminated. It's not a complete picture. You see the same pattern with the delta and the UK variant and that's because the vaccines had the wild type virus as the model. The Lambda variant is the C37 lineage and we make it and supply serology assays for it as a variant of concern. the guys who produced this paper didn't have it.
I would also add that there is complex immune response generated by the vaccines, including T-Cell. The vaccines even seem to generate and immune response to parts of the virus not part of the vaccine itself, and it's not clear why.
I also didn't say we should have unfettered international travel. I didn't mention travel at all.

As for flu, I am acutely aware of how flu mutates, I have worked with vaccine manufacturers to improve their serology and vaccine quantification assays. The group I recently worked with at Oxford are very close to a universal flu vaccine - one shot for life. There are other groups also getting to this point.

No it doesn't. The exact opposite in fact. Lambda variant does not completely evade vaccine protection - and this is the Chinese de-activated live virus vaccine. By the way, I didn't say it was impossible, I said it was "highly unlikely".
If you really want to look at this paper in detail they perform no serology - partly because they didn't have access to the Lambda antigen test, they use a pseudo viral neutralisation assay which shows only one part of the immune response, and that response is reduced but not eliminated. It's not a complete picture. You see the same pattern with the delta and the UK variant and that's because the vaccines had the wild type virus as the model. The Lambda variant is the C37 lineage and we make it and supply serology assays for it as a variant of concern. the guys who produced this paper didn't have it.
I would also add that there is complex immune response generated by the vaccines, including T-Cell. The vaccines even seem to generate and immune response to parts of the virus not part of the vaccine itself, and it's not clear why.
I also didn't say we should have unfettered international travel. I didn't mention travel at all.

As for flu, I am acutely aware of how flu mutates, I have worked with vaccine manufacturers to improve their serology and vaccine quantification assays. The group I recently worked with at Oxford are very close to a universal flu vaccine - one shot for life. There are other groups also getting to this point.