This may sound crazy but doing metta practise for the viruses/bacteria in my body has helped to consistently turn things round when I have been sick, actually the last three times in fact. Generating unconditional love for the micro-organisms seemed to change their energy a bit, perhaps even effecting their consciousness. And now I feel like they are part of me, but in a more benevolent form.
Metta is an energetic practise and means unconditional love, kindness, jovial goodwill, warmth and friendliness towards oneself and all other beings (not just humans).
I told all the virus/bacteria in my body, that they were all welcome to call my body their home, and that my heart-mind has resolved to become a Buddha. I offered to share the merit (benefits/knowledge) of my spiritual (bodhisattva) practise with all the different beings who call this body their home. All the different consciousnesses living in the body-mind, cells, bacteria, viruses, fungi, parasites. I wished them all well and said they were more than welcome to call this body their home and join me on the path to Buddhahood.
I saturated my entire body with this energy and then radiated it out into the world. Offering to share the merit of my spiritual practise with all beings everywhere, wishing them all to be well and serene, and for everyone to realise Buddhahood and cross over to nibbana and be free from suffering.
Metta is a powerful practise and is a skill worth learning, but it takes time for the practise to grow. Equanimity is also an energetic practise that is worth learning as it compliments metta really well. They go together like a knife and fork.
Here are some talks and Q&A sessions from a virtual retreat led by Ajahn Sona I took part in last Christmas, they teach how to practise metta and I can testify that this energy is real and with practise it will snowball and grow stronger and bring much benefit to one's life and those around.