Some of the other complications or possibilities is that some people experience side effects after taking the vaccine. Some of these side effects may be worse with the second dose. These are well-known and more well documented with all the data that has been seen in those who’ve been vaccinated. Some who’ve been vaccinated may experience mild side effects, such as pain, swelling, or redness at the site of the injection. Some may experience more severe side effects, such as headaches, nausea, vomiting, muscle pain, or chills. The majority of people will have some of the mild side effects, and currently there’s no evidence that points to the fact that the vaccine will affect fertility or future pregnancy.