Inhaled recombinant COVID-19 vaccine (type 5 adenoviral vector) (hereinafter referred to as the inhaled COVID-19 vaccine) is the first approved inhaled COVID-19 vaccine in China, with the advantages of good immunity, painlessness, and higher accessibility, which has been included in the WHO Emergency Use Listing and China's list of second-dose booster immunization vaccines. The real-world application of this vaccine deserves more attention due to the poor understanding of it by the public.

To understand the real experience in depth of first-line medical staff in epidemic prevention aged≥18 years in Guiyang city who received inhaled COVID-19 vaccine, so as to provide a reference for the promotion of this type of vaccine.

The recipients who completed the emergency vaccination with inhaled COVID-19 vaccine at a vaccination site of Guiyang city in October 2022 were selected as research subjects based on the the principle of booster immunization by using purposive sampling method. The sample size was determined by interviewing until no new case emerged which was data saturation. A total of 17 recipients were interviewed in this study. Semi-structured interviews were conducted with the research subjects, face-to-face interviews were conducted to understand the vaccination experience at that time firstly, and telephone interviews were conducted 5-7 days after vaccination. The Colaizzi seven-step analysis method was used for the data collection and analysis.

A total of five themes were summarized including the convenience of vaccination, good vaccination experience, light psychological burden, low vaccine hesitancy and uncertain protective effect. The convenience of vaccination includes simple and time-saving vaccination process, fast vaccination speed, low cost, and no interruption of nucleic acid testing; the good vaccination experience includes comfortable feeling of vaccination, harmonious observation atmosphere, fewer adverse reactions, and no interference with daily life; light psychological burden includes reduction of tension and anxiety of vaccination, better mental health maintenance, non-invasive vaccination and elimination of vaccination fears; low vaccine hesitancy includes high vaccination accessibility, increase of vaccine acceptance, increase of public perception of epidemic outbreak risk; uncertain protective effect includes uncertain which vaccination method provides better protection between injection and inhalation, whether inhaled COVID-19 vaccine has a good protective effect against variant strains.

Inhaled COVID-19 vaccine is convenient to administer with fewer adverse reactions, which is highly accepted by first-line medical staff in epidemic prevention aged≥18 years in Guiyang city with good experience.

吸入用重组新型冠状病毒疫苗（5型腺病毒载体）（以下简称吸入用新冠疫苗）是我国批准的首个吸入用新冠疫苗，具有免疫原性好、无痛、可及性高的优势，已被列入WHO紧急使用清单和我国的第二剂次加强免疫接种疫苗清单。由于民众对其了解甚少，因此该疫苗在真实世界中的应用研究值得关注。

深入了解贵阳市≥18岁抗疫一线人员接种吸入用新冠疫苗的真实感受，为该型疫苗的推广接种提供参考。

采用目的抽样法，根据加强免疫接种原则选取2022年10月在贵阳市某接种点完成紧急接种吸入用新冠疫苗的受种者作为研究对象，样本量的确定以访谈到没有新的信息出现，即访谈资料饱和为止，本研究共访谈了17位受种者。对研究对象进行半结构式访谈，首先采用面对面访谈了解当时的接种体验，并约定接种后5~7 d进行电话访谈，运用Colaizzi七步分析法对资料进行整理分析。

共归纳提炼出5个主题：接种便捷、接种体验好、心理负担轻、疫苗犹豫程度低以及保护效果不确定。接种便捷包括接种流程简便省时、接种速度快、接种成本低以及不影响核酸检测；接种体验好包括接种感觉舒适、留观氛围和谐、不良反应少以及不影响日常生活；心理负担轻包括减轻了接种疫苗的紧张、焦虑情绪，更好的保持心理健康以及无创接种，消除了注射恐惧；疫苗犹豫程度低包括接种可及性高、提升疫苗的接受程度以及疫情暴发提高了民众的疫情风险感知；保护效果不确定包括不知道注射与吸入哪种接种方式的保护效果更好以及不确定吸入用新冠疫苗对变异毒株是否有很好的保护作用。

吸入用新冠疫苗接种便捷且不良反应少，贵阳市≥18岁抗疫一线人员对其接受程度高，接种体验好。