Now Playing: Baby Born on Migrant Rescue Ship in Mediterranean Sea

Now Playing: Dramatic Video of Baby Falling Off Changing Table

Now Playing: Facing stress from the pandemic, thousands re-examine relationship with alcohol

Now Playing: ABC News Live Prime: Wednesday, February 24, 2021

Now Playing: ABC News Lives Presents Prescriptions for Health: Your Heart and You

Now Playing: What age should you be aware of prevention of heart disease?

Now Playing: The science on halting the gene that causes heart disease

Now Playing: ‘The Queen of Daytime’ shares how early diagnosis and intervention can save lives

Now Playing: What are the risk factors for heart disease in pregnant women?

Now Playing: People of color dealing with not receiving treatment needed for heart disease

Now Playing: What are the telltale signs of heart disease?

Now Playing: Anti-vax sentiment slows Europe’s vaccine rollout

Now Playing: By the Numbers: Children’s mental health crisis during pandemic

Now Playing: Single-dose vaccine effective against COVID-19 variants, data shows

Now Playing: The Johnson & Johnson COVID-19 vaccine could be authorized by Friday

Now Playing: Nursing home residents get 2nd dose of COVID-19 vaccine

Now Playing: Gov. Andrew Cuomo accused of undercounting nursing home deaths

Now Playing: Gov. Gavin Newsom says schools can reopen after declining COVID-19 cases

Now Playing: The Breakdown: 160 business leaders urge lawmakers to pass COVID relief plan

Now Playing: People turn online and to apps to improve mental health during pandemic