Immagration is a factor of relative wealth and physical access. People who immigrate to Europe do so because 1) Europe offers a significantly better quality of

Immagration is a factor of relative wealth and physical access. People who immigrate to Europe do so because 1) Europe offers a significantly better quality of life than their home country and 2) they can physically get there. Birthrate is also a wealth thing, maybe you can argue that the changes in wealth changed social norms, but that's indirect. The STD link you posted is a statement from the US CDC that reduction in healthcare availability because of COVID-19 caused STIs to go untreated and spread more. How does that relate to marriage norms at all?