Pharmacists Stella Kim, left, and Mei Tsai check the temperature of a cooler containing the Pfizer COVID-19 vaccine before heading out to inoculate two sisters, who have muscular dystrophy, at their home, Wednesday, May 12, 2021, in Torrance, Calif. Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Tsai, who coordinates the program. (AP Photo/Jae C. Hong)

Pharmacist Stella Kim, foreground left, administers the second dose of the Pfizer COVID-19 vaccine to Socorro Franco-Martinez, who has muscular dystrophy, in her apartment as Torrance firefighters, Trevor Borello, rear left, and Alessandro Demuro watch Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Socorro Franco-Martinez, seated, who has muscular dystrophy, is surrounded by Torrance firefighters as she talks with pharmacist Stella Kim, foreground left, after getting her second dose of the Pfizer COVID-19 vaccine in her apartment, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Pharmacist Stella Kim, right, and Torrance firefighter Trevor Borello leave an apartment building after administering the Pfizer COVID-19 vaccine to two sisters who have muscular dystrophy, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Barbara Franco, who has muscular dystrophy, smiles while talking to Torrance firefighters after receiving the second dose of the Pfizer COVID-19 vaccine at her apartment, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Torrance firefighter Trevor Borello carries a cooler containing the Pfizer COVID-19 vaccine to inoculate two sisters who have muscular dystrophy, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Alameda County nurse Devette Laflore administers a COVID-19 vaccine to Patti Amaral, 73, in the bedroom of her condominium in Hayward, Calif., May 6, 2021. Amaral, who has severe sciatica and has difficulty walking, has not left the upper floor of her condominium since the pandemic began. (AP Photo/Terry Chea)

Torrance firefighter Trevor Borello, left, administers the second dose of the Pfizer COVID-19 vaccine to Barbara Franco, who has muscular dystrophy, at her apartment, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Torrance firefighter Trevor Borello, left, carries a cooler containing the Pfizer COVID-19 vaccine as he walks to an apartment to inoculate two sisters who have muscular dystrophy, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Torrance fire Capt. John Kubota, right, hands a cooler containing the Pfizer COVID-19 vaccine to Alessandro Demuro as they prepare to inoculate two sisters who have muscular dystrophy, at their home, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Alameda County nurse Patricia Calloway administers a COVID-19 vaccine to William Brainerd inside his studio apartment in San Leandro, Calif., May 6, 2021. Brainerd, who says he cannot wear a mask because of respiratory issues, has not left his apartment complex since the pandemic began. (AP Photo/Terry Chea)

Pharmacist Stella Kim, left, and Torrance firefighter Trevor Borello, right, talk with Barbara Franco, who has muscular dystrophy, before administering the second dose of the Pfizer COVID-19 vaccine at her apartment, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

John McFarland, 70, shows his vaccination card after receiving the COVID-19 vaccine inside his bedroom in Hayward, Calif., May 6, 2021. Alameda County nurses Patricia Calloway, left, and Devette Laflore chat with his wife, Patti Amaral, 73, while they waited to make sure there were no vaccine side effects. (AP Photo/Terry Chea)

A blood oxygen monitor is attached to Socorro Franco-Martinez, who has muscular dystrophy, after she received the second dose of the Pfizer COVID-19 vaccine at her apartment, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Torrance firefighters Trevor Borello, left, and Alessandro Demuro carry a cooler containing the Pfizer COVID-19 vaccine and medical equipment as they walk to an apartment to inoculate two sisters who have muscular dystrophy, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)

Pharmacist Stella Kim checks the temperature of a cooler containing the Pfizer COVID-19 vaccine as she and Torrance firefighters arrive at an apartment building to inoculate two sisters who have muscular dystrophy, Wednesday, May 12, 2021, in Torrance, Calif. (AP Photo/Jae C. Hong)

Maria Franco, 7, talks with Torrance fire Capt. John Kubota while her two aunts, who have muscular dystrophy, are monitored after receiving the Pfizer COVID-19 vaccine in their apartment, Wednesday, May 12, 2021, in Torrance, Calif. Teamed up with the Torrance Fire Department, Torrance Memorial Medical Center started inoculating people at home in March, identifying people through a city hotline, county health department, senior centers and doctor's offices, said Mei Tsai, the pharmacist who coordinates the program. (AP Photo/Jae C. Hong)