It's probably because most of the world aren't ready to face a global pandemic that is easily transmitted like Covid-19 yet. Before, maybe the transmission of the virus can be stopped since mobility is still limited, however now, it's really easy to go everywhere, and most people are still ignorant, not wearing mask or social distancing, making it easier for people to get infected. People complaining wanting their old lives back, but the step that can be taken now sure only is vaccination, at least it will prevent some cases although not all, and won't make them severe. But the vaccination rate is still low, and not that effective, so actually it's great for vaccine makers to think how to improve it and make the better version of the vaccine, we need to cooperate to of course, willing to get vaccinated and follow all of the health protocol.