Sxmmartini is referring to a micro-needle patch for the vaccine, which continuously injects medicine through 41 tiny needles as you wear it for say 30 days or so. I'm not sure, but this may apply to other Covid-19 vaccines still in development such as the one from AstraZeneca in England. I don't believe the Pfizer vaccine can be delivered in that manner. At this time it looks like the Pfizer vaccine will still require two injections, but I'm fine with that. The cold storage will be a potential issue in more remote locations, but one that can surely be overcome. The temperature of 'dry ice' is negative -78 celsius, so maybe that can be used to keep the vaccine viable while in storage?