import pandas as pd


def disease_info(disease_index):
    df = pd.read_excel(r"disease_info.xlsx")
    df = df[df["Disease"] == disease_index].iloc[0]
    html_text = ""
    html_text += "<h1>Diagnosis</h1>\n" + "<p>" + str(df["Diagnosis"]) + "</p>" + "<br><br>"
    html_text += "<h1>Cause</h1>\n"  + "<p>" + str(df["Cause"]) + "</p>" + "<br><br>"
    html_text += "<h1>Symptoms</h1>\n"  + "<p>" + str(df["Symptoms"]) + "</p>" + "<br><br>"
    html_text += "<h1>Treatment</h1>\n"  + "<p>" + str(df["Treatment"]) + "</p>" + "<br><br>"
    return html_text