Natural, high UV blue light exposure in the daytime will actually contribute to both Vitamin D optimisation and a good night's sleep. In the evenings, avoid the artificial blue light, optimise your melatonin and get good sleep.
Here's a list of vitamins and minerals we have that can contribute to your immunity boost. We'll do our best to maintain stock, as long as suppliers are capable. We're working on getting more Vitamin C, Andrographis, colloidal silver and nebulisers. We don't know how long this situation is going to last, so stock up while you can.