The podcast discusses several risks associated with vaccines, particularly focusing on adenovirus vector vaccines like Johnson & Johnson, AstraZeneca, and Sputnik V, as well as mRNA vaccines like Moderna and Pfizer.

1. Adenovirus Vector Vaccines:
- Vaccine-Induced Thrombotic Thrombocytopenia (VITT): This is a rare but severe side effect seen with adenovirus vector vaccines such as Johnson & Johnson and AstraZeneca. It's a type of blood clotting disorder that can be catastrophic if it occurs. This has led to the CDC giving preferential guidance towards mRNA vaccines over these adenovirus vector vaccines 00:26:30 to 00:26:57.
- The issue of VITT is considered a "class effect" with adenovirus vector vaccines, affecting similarly other vaccines like Sputnik V 00:26:39 to 00:26:49.

2. mRNA Vaccines:
- Myocarditis: This is an inflammation of the heart muscle observed more frequently in young men, specifically after receiving the Moderna vaccine. The risk is higher with Moderna compared to Pfizer, likely due to the higher dose of Moderna (100 micrograms vs. Pfizer's 30 micrograms). It's also noted that the risk increases with shorter intervals between doses 00:28:00 to 00:28:56 and 00:29:00 to 00:29:29.
- While myocarditis is a concern, it’s generally seen as less severe compared to VITT. Most cases of myocarditis have been mild and patients have recovered fully 00:27:00 to 00:27:26.

3. General Safety Observations:
- The CDC has noted that the risk of severe outcomes from COVID-19 with just a two-dose mRNA vaccine is extremely low, with the chance of dying from COVID being 0.00003% across the general population 00:36:01 to 00:36:18.

These points provide a detailed understanding of the risks associated with different types of vaccines, allowing listeners to make informed decisions and consider the level of severity and frequency of these side effects.