The Covid-19 vaccines contains nanoparticles that self-assemble (frequency on) and disassemble (frequency off) from 5G frequencies radiation and other antenna sources such as WiFi, smart meters, mobile phones, computers, etc. Self-assembled mRNA vaccines - https://pubmed.ncbi.nlm.nih.gov/33400957/

Single-component, self-assembling, protein nanoparticles presenting the receptor binding domain and stabilized spike as SARS-CoV-2 vaccine candidates - https://pubmed.ncbi.nlm.nih.gov/32995773/

That is why it has been so important to build all these 4G-5G systems worldwide as fast as possible while people were in lockdowns. The Wuhan "Covid-19" outbreak started after the Chinese government activated the 10,000 5G sites they had build there in autumn 2019.