COVID-19 vaccine, viral vector-Janssen
Dosing & Uses
ADULT
Dosage Forms & Strengths
injection, suspension
5x1010 virus particles/0.5mL (5 doses per vial)
COVID-19 Disease Prevention
February 27, 2021: Emergency use authorization (EUA) issued by FDA for active immunization to prevent coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in individuals aged ≥18 years
0.5 mL IM as a single dose
Dosing Considerations
Limitations of effectiveness: May not protect all vaccine recipients
Data unavailable on use of the Janssen COVID-19 vaccine to complete a vaccination series initiated with another COVID-19 vaccine
Efficacy against moderate-to-severe/critical COVID-19
No overall differences in safety or efficacy were observed between individuals aged ≥65 yr and younger individuals
Aged 18-59 years
14 days post vaccination: 63.7%
28 days post vaccination: 66.1%
Aged ≥60 years
14 days post vaccination: 76.3%
28 days post vaccination: 66.2%
Efficacy against confirmed severe/critical COVID-19
Aged ≥18 years
14 days post vaccination: 76.7%
28 days post vaccination: 85.4%
Efficacy against severe/critical COVID-19 by variant
Data as of February 12, 2021
United States
96.4% of strains identified as the Wuhan-H1 variant D614G during the trial
28 days post vaccination: 85.9%
Brazil
69.4% of strains identified as a variant of the P.2 lineage and 30.6% of strains identified as the Wuhan-H1 variant D614G
28 days post vaccination: 87.6%
South Africa
94.5% of strains identified as the 20H/501Y.V2 variant (B.1.351 lineage)
28 days post vaccination: 81.7%
Adverse Effects
Mandatory for vaccination providers to report to the vaccine adverse events reporting system (VAERS) all vaccine administration errors, serious adverse events, multisystem inflammatory syndrome in adults and children, and hospitalized or fatal cases of COVID-19 following vaccination
May submit report online or fax it to VAERS at 1-877-721-0366
>10%
7 days post vaccination; aged 18-59 yr
Injection site pain (58.6%)
Headache (44.4%)
Fatigue (43.8%)
Myalgia (39.1%)
Use of antipyretic or pain medication (26.4%)
Nausea (15.5%)
Fever (12.8%)
7 days post vaccination; aged ≥60 yr
Injection site pain (33.3%)
Headache (30.4%)
Fatigue (29.7%)
Myalgia (24%)
Nausea (12.3%)
1-10%
7 days post vaccination; aged 18-59 yr
Injection site erythema (9%)
Injection site swelling (7%)
Myalgia, Grade 3 (1.4%)
Fatigue, Grade 3 (1.2%)
7 days post vaccination; aged ≥60 yr
Use of antipyretic or pain medication (9.8%)
Injection site erythema (4.6%)
Fever (3.1%)
Injection site swelling (2.7%)
<1%
7 days post vaccination; aged 18-59 yr
Grade 3
Headache (0.9%)
Injection site pain (0.4%)
Injection site erythema (0.3%)
Fever (0.3%)
Injection site swelling (0.2%)
Nausea (0.1%)
7 days post vaccination; aged ≥60 yr
Grade 3
Fatigue (0.8%)
Headache (0.4%)
Injection site pain (0.2%)
Injection site swelling (0.2%)
Myalgia (0.2%)
Injection site erythema (0.1%)
Fever (0.1%)
Warnings
Contraindications
Known history of severe allergic reaction (eg, anaphylaxis) to any component in vaccine
Cautions
Immunocompromised persons, including individuals receiving immunosuppressant therapy, may have diminished immune response to the vaccine
Vaccine may not protect all vaccine recipients
Allergic reactions
Appropriate medical treatment used to manage immediate allergic reactions must be immediately available following vaccination
Individuals with histories of severe allergic reaction to vaccines should consult their doctors about the COVID-19 vaccine
Monitor vaccine recipients for immediate adverse reactions according to the Centers for Disease Control and Prevention guidelines
Drug interaction overview
Data are not available to assess concomitant administration with other vaccines
Pregnancy
Data are insufficient to inform of vaccine-associated risks in pregnancy
Women vaccinated with Janssen COVID-19 vaccine are encouraged to enroll in the pregnancy exposure registry
CDC guidelines for vaccination of pregnant or lactating women
Lactation
Data are not available to assess effects on breastfed infants or on milk production/excretion
Pregnancy Categories
A: Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.
B: May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk.
C: Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done.
D: Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk.
X: Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist.
NA: Information not available.
Pharmacology
Mechanism of Action Vaccine is composed of a recombinant, replication-incompetent human adenovirus type 26 vector that after entering human cells, expresses the SARS-CoV-2 spike (S) antigen without virus propagation An immune response elicited to the S antigen protects against COVID-19
Administration
IM Preparation
Suspension is a colorless to slightly yellow, clear to very opalescent suspension
Visually inspect for particulate matter and discoloration; if either of these conditions exists, do not administer
Carefully mix vial contents by swirling gently in an upright position for 10 seconds; do NOT shake
Each dose is 0.5 mL; each vial contains 5 doses; do not pool excess vaccine from multiple vials
IM Administration
For IM injection only
Storage
Receiving shipment
Once received, do not freeze
Initially stored frozen by the manufacturer, then shipped at 2-8ºC (36-46ºF)
If vaccine is still frozen upon receipt, thaw in refrigerator at 2-8ºC (36-46ºF)
If needed immediately, thaw at room temperature (maximally 25ºC/77ºF)
At room temperature, a carton of 10 vials takes ~2 hr to thaw, and an individual vial takes ~1 hour to thaw
Do not refreeze once thawed
Unopened vials
Refrigerated: 2-8ºC (36-46ºF) and protect form light; do not freeze
Room temperature: 9-25ºC (47-77ºF) for up to 12 hr
Opened vials
Refrigerated: 2-8ºC (36-46ºF) for up to 6 hr, OR
Room temperature: Maximally 25ºC (77ºF) for up to 2 hr
Discard if vaccine is not used within these times
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