Social media platforms such as Facebook have been very strict on issues such as the US presidential election, covid-19 and vaccines. Earlier this month, Facebook announced that it would begin to remove conspiracy theories about the covid-19 vaccine, including all advertisements related to medical masks, hand sanitizers and covid-19 test kits. At present, the company has revised its advertising policy, saying that it will now allow advertising of covid-19 vaccine, as long as it is delivered by the sender and not for commercial interests. < / P > < p > operationally, Facebook will allow advertisements for covid-19 vaccines, as long as they advertise information about how to safely obtain vaccines and how to prevent the spread of the virus, and no false information is allowed. Claims that the vaccine is a cure for the virus are clearly not allowed. < / P > < p > in view of the recent approval of covid-19 vaccines, we hope that people can safely promote information about these vaccines on Facebook. We will now allow advertisements that emphasize that the covid-19 vaccine can protect people from the virus, as well as advertisements that promote safe access to the covid-19 vaccine. We will continue to ban content that attempts to exploit epidemics for commercial gain. However, advertisements or posts promoting the sales of covid-19 vaccine, such as attempting to sell covid-19 vaccine packages or guidelines for quick access to vaccines, will be rejected. We will also reject advertisements claiming that vaccines can cure the virus. < / P > < p > the policy change will take effect from now on, but Facebook says it will take time to properly implement the policy, given that its systems and technical teams need to be trained in this area. SpaceX beat blue origin and Northrop Grumman to win a $316 million air force contract