"Go to an old cemetery. See all the baby graves from before the 1950s & 60s? After that, hardly any. That's when people started vaccinating their children against deadly childhood diseases. If you're unsure what to do to protect your kids, the answer is literally written in stone." — Michael Okuda

The statement attributes a visible reduction in baby graves in cemeteries after the 1950s and 60s primarily to the introduction of childhood vaccinations. While it is true that vaccines against deadly childhood diseases (such as measles, diphtheria, and polio) were introduced and widely adopted during this period, leading to significant reductions in mortality from these diseases, the overall decline in infant and child mortality was multifactorial.

1. Vaccination Impact: Vaccines have played a critical role in reducing deaths from infectious diseases. For example, the introduction of the polio vaccine in the mid-1950s and measles vaccine in the 1960s drastically reduced incidence and mortality.

2. Other Medical Advances: Improvements in prenatal care, neonatal intensive care, antibiotics, and general healthcare also contributed substantially to infant survival.

3. Public Health Improvements: Enhanced sanitation, clean water supply, better nutrition, and socioeconomic development during the mid-20th century were major contributors to declining infant mortality rates.

4. Cemetery Data Limitations: Using cemetery baby grave counts as a proxy for infant mortality trends is problematic because burial practices vary by culture, location, and over time. Many infants may have been buried elsewhere or cremated; records may be incomplete or inaccessible.

5. No Direct Evidence from Provided Sources: None of the provided sources (which focus on Michael Okuda's career related to Star Trek) provide evidence supporting or refuting this claim about vaccination and cemetery graves. The quote appears on Michael Okuda's social media but lacks corroboration from authoritative epidemiological or historical data within these sources.

In summary, while vaccination is a key factor in reducing childhood deaths, attributing the decline in baby graves solely to vaccination oversimplifies complex historical public health improvements. The phrase "the answer is literally written in stone" is metaphorical but risks misleading by implying a direct causal relationship visible in cemeteries without supporting data.