Most current Covid rules will remain for four more weeks after 21 June, government sources say.
Bottles were thrown at officers treating the stabbed man, and another was bitten, police say.
All over-18s have been offered a first vaccination six weeks ahead of schedule, Wales' health minister says.
People may need to be on the lookout for different Covid symptoms, according to researchers.
Plans to keep Covid rules in place for an extra month will hurt clubs and restaurants, say trade groups.