What I do I start imagining myself in a magic invisible bubble. It looks like the multicolored bubbles that children blow from soap and water. The bubble surrounds me and protects me. No one is allowed in.
I use this bubble for many things mostly to keep negativity away and protect myself from whatever.
When I am surrounded with sick people or are in a place that works on them, I am so GREATFUL that this is a place of healing and send love to all of them so that they will become. Well.