Employers that mandate the Covid vaccine will be liable for any adverse effects, since they mandated the jab as part of a workplace requirement. I suppose worker's comp will cover the costs of treatment, but as all employers know, claims increase rates, and high rates can remove an ability to compete, or make a profit. Employers can try to skate liability by offering incentives for voluntary injections, but the duress is really still there, and any pressure on employees can be construed as workplace harassment.
So, what will happen? I don't know, but the manufacturers of the vaccine have no liabilities, and the insurance companies can use the leverage of increased rates to cover additional costs. When you add the possibility of death due to a company's decision, the tort sharks will circle, and have a feeding frenzy.
This will be interesting to watch, but I have a feeling the bankruptcy courts might find increased business.