Here’s some of HealthDay’s top stories for Monday, June 28:

Evidence that Pfizer, Moderna vaccines give long-term immunity. New studies support the notion that mRNA-based vaccines could leave immune system ‘memory’ cells on guard against COVID for years — no boosters needed. Read more

Worry over milestones. A new poll finds that a quarter of parents are concerned their child isn’t reaching key developmental milestones. But if their sources of info on ‘normal’ development are wrong, is that worry unfounded? Read more

Anxious owners, anxious dogs? New research — and the stinging testimony of dog trainers — suggests that worry-prone humans can transfer that tension to their pet pooches. It doesn’t have to be that way. Read more

Heart failure’s double whammy. Millions of older Americans struggle with an underperforming heart. Now, new research suggests heart failure may also raise their odds for cancer. Read more