That there are Hot Lots of vaccines that cause more side effects or vaccine injuries than other vaccine lots is a common vaccine myth.
The Hot Lots Vaccine Myth
Like most other things, vaccines are made in batches or lots.
These lots are then tested “to ensure safety, purity, and potency.”
Vaccine lots aren’t all the same size though. A small lot is going to appear to be a “hot lot,” having more reports of side effects than a much larger vaccine lot.
And a report of a vaccine injury in VAERS, where most reports of hot lots come from, doesn’t mean that the vaccine actually caused the injury or side effect.
“When evaluating data from VAERS, it is important to note that for any reported event, no cause-and-effect relationship has been established. Reports of all possible associations between vaccines and adverse events (possible side effects) are filed in VAERS. Therefore, VAERS collects data on any adverse event following vaccination, be it coincidental or truly caused by a vaccine. The report of an adverse event to VAERS is not documentation that a vaccine caused the event.”
Guide to Interpreting VAERS Data
Interestingly, the first edition of the National Vaccine Information Center’s newsletter published a list of “especially toxic” DPT vaccine lots.
Their DPT vaccine Hot Lot list was compiled by finding lot numbers “which are associated with the highest numbers of deaths, injuries and hospitalizations reported to the government’s Vaccine Adverse Event Reporting System.”

Again, VAERS is a passive reporting system. Since anyone can report a reaction, simply being in VAERS doesn’t mean that that the reaction was caused by a vaccine.
More on the Hot Lots Vaccine Myth
- A Shot at the Dark – DPT vs DTaP
- About Those Lawsuits That Almost Put Vaccine Manufacturers out of Business
- Vaccine Testing and Development Timeline and Myths
- Why Aren’t Vaccines Regulated like Drugs?
- Anti-Vaccine Points Refuted A Thousand Times
- Vaccine Safety
- WHO – Six common misconceptions about immunization
- Vaccine procurement and lot release
- Misconceptions about Hot Lots
- 2013 Voluntary Recall of One Lot of Gardasil HPV Vaccine
- The Vanishing Victims