The document discusses vaccination and COVID-19 vaccines. It explains that vaccines safely stimulate the immune system to generate antibodies to protect against illnesses. While side effects of vaccines may include pain or fever, COVID-19 vaccines have proven to be safe and effective through clinical trials. When exposed to the targeted virus, the antibodies generated by vaccination help the immune system fight off illness and lower the chances of contracting it. Common symptoms after vaccination result from the immune system's natural response to attack the virus. Global policies will impact the course of the pandemic and economic recovery from coronavirus.