R.K.
Don't let the fear mongers get to you...!!!
Are they safe ..? Are they dangerous..? Who knows so much fake news and fear mongering going on to really know. I just remember in the 1980's we were told to avoid the sun so we wouldn't get skin cancer ... now they are saying that sunscreen causes cancer. When I was a child I remember hearing about what a wonderful creation asbestos was -- now it causes cancer.
Use the best judgment you can and just go with it. Stop worrying so much.