Summarize this article in one sentence.
To make sure your beagle stays healthy, make sure you take him to the vet regularly. At eight weeks, take your beagle to the vet to check his overall health as well as him early vaccinations. These include those for distemper, rabies, and Lyme disease.  Talk to your vet about a regiment of preventative medication for heartworms as well. This disease can cause illness and even death. After the first checkup, your beagle will need a booster shot for his vaccinations. Once he is older, he will need a yearly checkup. Once your dog is six to nine months old, consider fixing your pet. This can help with certain diseases, such as tumors and cancer. It will also help you avoid unwanted puppies and certain behavioral issues.  Avoid doing this if you plan on breeding your dog.  Make sure to research this matter further, as new studies are coming out all the time regarding the health concerns of spaying/nuetering while the beagle is young. There are certain issues that may arise because of your dog is a beagle. This means that your beagle will be more prone to these disorders than other breeds. These issues include:  Seizure disorders Hypothyroidism Allergies Hip dysplasia Inter-vertebral disc disease

Summary:
Take him for checkups. Spay or neuter your pet. Watch out for breed specific diseases.